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CVE-2026-95838ModerateRevised 6 Nov

containerd: Unpack DoS via repeated opaque whiteouts

MSRC advisory NVD CVE.org

Assessment

Severity
Moderate
CVSS base score
Not published
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-400: Uncontrolled Resource Consumption
Issued by
GitHub_M
Published
14 Oct 2026 · October 2026
Last revised
6 Nov 2026Information published.

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
9 affected products
  • azl3 containerd2 2.3.4-1 on Azure Linux 3.0
  • azl3 kata-containers 4.1.0.kata0-1 on Azure Linux 3.0
  • azl3 kata-containers 4.1.0.kata1-2 on Azure Linux 3.0
  • azl3 kata-containers-cc 3.15.0.aks0-21 on Azure Linux 3.0
  • azl3 kata-containers-cc 3.15.0.aks0-23 on Azure Linux 3.0
  • azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0
  • azl3 moby-containerd-cc 1.7.7-19 on Azure Linux 3.0
  • azl3 moby-engine 25.0.18-1 on Azure Linux 3.0
  • azl3 moby-engine 25.0.3-20 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. Affected products: azl3 containerd2 2.3.4-1 on Azure Linux 3.0, azl3 kata-containers 4.1.0.kata0-1 on Azure Linux 3.0, azl3 kata-containers-cc 3.15.0.aks0-21 on Azure Linux 3.0, azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0, azl3 moby-engine 25.0.3-20 on Azure Linux 3.0 → azl3 containerd2 2.3.4-1 on Azure Linux 3.0, azl3 kata-containers 4.1.0.kata0-1 on Azure Linux 3.0, azl3 kata-containers 4.1.0.kata1-2 on Azure Linux 3.0, azl3 kata-containers-cc 3.15.0.aks0-21 on Azure Linux 3.0, azl3 kata-containers-cc 3.15.0.aks0-23 on Azure Linux 3.0, azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0, azl3 moby-containerd-cc 1.7.7-19 on Azure Linux 3.0, azl3 moby-engine 25.0.18-1 on Azure Linux 3.0, azl3 moby-engine 25.0.3-20 on Azure Linux 3.0
  6. 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
  7. 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
  8. 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
  9. Affected products: azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0 → azl3 containerd2 2.3.4-1 on Azure Linux 3.0, azl3 kata-containers 4.1.0.kata0-1 on Azure Linux 3.0, azl3 kata-containers-cc 3.15.0.aks0-21 on Azure Linux 3.0, azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0, azl3 moby-engine 25.0.3-20 on Azure Linux 3.0
Page history

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Cite this version
Field-level log (41)

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. 6 Nov 2026 · 09:07:49 UTC Last revised2 Nov 2026 01:47 UTC → 6 Nov 2026 01:45 UTC
  10. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  11. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  12. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  13. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  14. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  15. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  16. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  17. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  18. 2 Nov 2026 · 09:04:36 UTC Last revised31 Oct 2026 14:46 UTC → 2 Nov 2026 01:47 UTC
  19. 2 Nov 2026 · 09:04:36 UTC Affected productsazl3 containerd2 2.3.4-1 on Azure Linux 3.0, azl3 kata-containers 4.1.0.kata0-1 on Azure Linux 3.0, azl3 kata-containers-cc 3.15.0.aks0-21 on Azure Linux 3.0, azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0, azl3 moby-engine 25.0.3-20 on Azure Linux 3.0 → azl3 containerd2 2.3.4-1 on Azure Linux 3.0, azl3 kata-containers 4.1.0.kata0-1 on Azure Linux 3.0, azl3 kata-containers 4.1.0.kata1-2 on Azure Linux 3.0, azl3 kata-containers-cc 3.15.0.aks0-21 on Azure Linux 3.0, azl3 kata-containers-cc 3.15.0.aks0-23 on Azure Linux 3.0, azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0, azl3 moby-containerd-cc 1.7.7-19 on Azure Linux 3.0, azl3 moby-engine 25.0.18-1 on Azure Linux 3.0, azl3 moby-engine 25.0.3-20 on Azure Linux 3.0
  20. 1 Nov 2026 · 07:59:15 UTC Last revised24 Oct 2026 14:48 UTC → 31 Oct 2026 14:46 UTC
  21. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  22. 29 Oct 2026 · 20:19:26 UTC EPSSNot scored → No EPSS score collected
  23. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  24. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → Unknown: not stated by MSRC
  25. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → Unknown: not stated by MSRC
  26. 25 Oct 2026 · 07:41:18 UTC Last revised15 Oct 2026 01:06 UTC → 24 Oct 2026 14:48 UTC
  27. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  28. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  29. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  30. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  31. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  32. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  33. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  34. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  35. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  36. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  37. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  38. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  39. 18 Oct 2026 · 14:54:30 UTC Link: October 2026/security?release=2026-Oct#cves
  40. 15 Oct 2026 · 07:14:54 UTC Last revised14 Oct 2026 02:55 UTC → 15 Oct 2026 01:06 UTC
  41. 15 Oct 2026 · 07:14:54 UTC Affected productsazl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0 → azl3 containerd2 2.3.4-1 on Azure Linux 3.0, azl3 kata-containers 4.1.0.kata0-1 on Azure Linux 3.0, azl3 kata-containers-cc 3.15.0.aks0-21 on Azure Linux 3.0, azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0, azl3 moby-engine 25.0.3-20 on Azure Linux 3.0

Explore global source statements, affected packages and advisory history for CVE-2026-95838. The catalog has a separate collection scope from Microsoft release records.

Explicit identifiers and source references

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-95838 · Microsoft / collected KEV context

EUVD-2026-97822

GHSA-rp3h-jf77-q9p4

GO-2026-6796

cve-program · CVE-2026-95838

euvd · EUVD-2026-97822

nvd · CVE-2026-95838

osv · GHSA-rp3h-jf77-q9p4

osv · GO-2026-6796

Related operational evidence

Explicit CVE identifiers
ChangeIntel

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