{"id":"CVE-2026-95838","state":"PUBLISHED","title":"containerd: Unpack DoS via repeated opaque whiteouts","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.","publishedAt":"2026-10-12T19:53:24.599Z","updatedAt":"2026-10-13T20:24:33.956Z","severity":{"score":4.6,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["containerd containerd"],"affected":[{"vendor":"containerd","product":"containerd","versions":[{"version":"< 1.7.35","status":"affected"},{"version":">= 2.0.0-beta.0, < 2.0.12","status":"affected"},{"version":">= 2.2.0, < 2.2.8","status":"affected"},{"version":">= 2.3.0, < 2.3.5","status":"affected"}]}],"references":["https://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4","https://github.com/containerd/containerd/commit/e6ca378dcfa610d06589a3ac96aa992de866e4f0"],"weaknesses":["CWE-400","CWE-407"],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/95xxx/CVE-2026-95838.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-95838","state":"PUBLISHED","datePublished":"2026-10-12T19:53:24.599Z","dateUpdated":"2026-10-13T20:24:33.956Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-22T16:39:45.793Z"},"containers":{"cna":{"title":"containerd: Unpack DoS via repeated opaque whiteouts","descriptions":[{"lang":"en","value":"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":[{"vendor":"containerd","product":"containerd","versions":[{"version":"< 1.7.35","status":"affected"},{"version":">= 2.0.0-beta.0, < 2.0.12","status":"affected"},{"version":">= 2.2.0, < 2.2.8","status":"affected"},{"version":">= 2.3.0, < 2.3.5","status":"affected"}]}],"references":[{"url":"https://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4","name":"https://github.com/containerd/containerd/security/advisories/GHSA-rp3h-jf77-q9p4","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/containerd/containerd/commit/e6ca378dcfa610d06589a3ac96aa992de866e4f0","name":"https://github.com/containerd/containerd/commit/e6ca378dcfa610d06589a3ac96aa992de866e4f0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":4.6,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-407","lang":"en","description":"CWE-407: Inefficient Algorithmic Complexity","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-12T19:53:24.599Z"},"source":{"advisory":"GHSA-rp3h-jf77-q9p4","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-13T20:13:22.924285Z","id":"CVE-2026-95838","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-13T20:24:33.956Z"}}]}}}