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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

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 (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.

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.

Dated risk observations

Risk history is separate from CNA/OSV content history. Daily score drift is retained but only an upward crossing of 10% triggers the prediction change event.

Immutable source observations

10 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

7 Nov 2026 15:26:49 UTC

containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger re…

euvd · EUVD-2026-97822 · Published

5 Nov 2026 14:42:14 UTC

containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger re…

euvd · EUVD-2026-97822 · Published

3 Nov 2026 14:05:54 UTC

containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger re…

euvd · EUVD-2026-97822 · Published

1 Nov 2026 13:06:14 UTC

containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger re…

euvd · EUVD-2026-97822 · Published

30 Oct 2026 12:55:21 UTC

containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger re…

euvd · EUVD-2026-97822 · Published

28 Oct 2026 10:37:47 UTC

containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger re…

euvd · EUVD-2026-97822 · Published

25 Oct 2026 16:19:28 UTC

containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd's layer unpack handler repeatedly traverses directories for certain opaque whiteout configurations. A malicious image layer can trigger re…

nvd · CVE-2026-95838 · Published

24 Oct 2026 13:19:41 UTC

containerd: Unpack DoS via repeated opaque whiteouts in github.com/containerd/containerd

osv · GO-2026-6796 · Published

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 15:15 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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