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[ CVE-2026-95838 · Published 12 Oct 2026 ]

containerd: Unpack DoS via repeated opaque whiteouts

CVSS 4.6 EPSS <1%Fix available

[ Description ]Official description

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 repeated directory traversals while opaque whiteouts are processed. Pulling or importing the image can consume CPU, delay container startup, and reduce image-pull concurrency for unrelated deployments. This issue is fixed in versions 1.7.35, 2.0.12, 2.2.8, and 2.3.5.

[ Fixes ]Fixes and patches

[ Packages ]Affected open-source packages

  • github.com/containerd/containerd/v2 goAffected < 2.0.12 · fixed in 2.0.12 · GHSA-rp3h-jf77-q9p4
  • github.com/containerd/containerd goAffected < 1.7.35 · fixed in 1.7.35 · GHSA-rp3h-jf77-q9p4
  • github.com/containerd/containerd/v2 goAffected >= 2.2.0, < 2.2.8 · fixed in 2.2.8 · GHSA-rp3h-jf77-q9p4
  • github.com/containerd/containerd/v2 goAffected >= 2.3.0, < 2.3.5 · fixed in 2.3.5 · GHSA-rp3h-jf77-q9p4

[ References ]References