What’s Vulnerable › Vulnerabilities

CVE-2026-95838: containerd: Unpack DoS via repeated opaque whiteouts

• Severity: medium (CVSS 4.6 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-12 · updated 2026-10-16
• Weakness: CWE-400

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.

Affected products

• containerd: before 1.7.35; from 2.0.0-beta.0, < 2.0.12; from 2.2.0, < 2.2.8; from 2.3.0, < 2.3.5

References

• https://github.com/containerd/containerd/commit/e6ca378dcfa610d06589a3ac96aa992de866e4f0
• https://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4

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