medium4.6
CVE-2026-95838
containerd: Unpack DoS via repeated opaque whiteouts
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/containerd/containerd/v2 | < 2.0.12 | 2.0.12 |
| go | github.com/containerd/containerd | < 1.7.35 | 1.7.35 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-rp3h-jf77-q9p4
- https://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4
- https://nvd.nist.gov/vuln/detail/CVE-2026-95838
- https://github.com/containerd/containerd/commit/e6ca378dcfa610d06589a3ac96aa992de866e4f0