{"id":"GO-2026-6444","revision":null,"records":[{"revision":"27c74511154c4616ac6f25fd4f27455f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53495","aliases":[],"title":"containerd CRI ExecSync Goroutine Leak Leading to Node-Level Denial of Service","description":"containerd is an open-source container runtime. Prior to 1.7.35, 2.0.12, 2.2.8, and 2.3.5, containerd on Linux with the CRI plugin enabled can indefinitely block the drainExecSyncIO goroutine in internal/cri/server/container_execsync.go when CRI ExecSync is used by exec probes or lifecycle hooks that launch long-lived background child processes retaining standard input and output pipes. The input and output drain phase has no default timeout and did not stop when the request context was canceled, so repeated ExecSync invocations can accumulate blocked goroutines and host memory. The resulting resource exhaustion can cause the OOM killer to terminate containerd, leaving the container runtime unavailable until restart. Deployments not using containerd's CRI implementation and containers not running on Linux are not affected. 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Over time, this resource exhaustion can cause the containerd daemon to be terminated by the OOM killer, rendering containerd unavailable until it is restarted. This issue affects containerd on Linux systems running with the CRI plugin enabled. Users not using containerd's CRI implementation or not running containers on Linux are not affected.\n\n### Patches\n\nThis bug has been fixed in containerd 2.3.5, 2.2.8, 2.0.12, and 1.7.35. Users should update to these versions to resolve the issue.\n\n### Workarounds\n\nEnsure exec probes and lifecycle hooks do not launch long-lived background child processes.\n\n### Credits\n\nThe containerd project would like to thank XlabAI Team of Tencent Xuanwu Lab (xlabai@tencent.com), including Guannan Wang, Zhanpeng Liu, Jiashuo Liang, and Guancheng Li, and @IamwhatIamSY who independently discovered and responsibly disclosed this issue in accordance with the [containerd security policy](https://github.com/containerd/project/blob/main/SECURITY.md).\n\n### For more information\n\nIf there are any questions or comments about this advisory:\n\n* Open an issue in [containerd](https://github.com/containerd/containerd/issues/new/choose)\n* Send an email to [security@containerd.io](mailto:security@containerd.io)\n\nTo report a security issue in containerd:\n* [Report a new vulnerability](https://github.com/containerd/containerd/security/advisories/new)\n* Send an email to [security@containerd.io](mailto:security@containerd.io)","state":0,"publishedAt":"2026-09-09T18:01:33+00:00","modifiedAt":"2026-09-17T17:40:55.1228229+00:00","affected":[{"ecosystem":"Go","name":"github.com/containerd/containerd/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.0.12"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/containerd/containerd","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.7.35"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/containerd/containerd/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.2.0"},{"kind":"fixed","version":"2.2.8"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/containerd/containerd/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.3.0"},{"kind":"fixed","version":"2.3.5"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/containerd/containerd/security/advisories/GHSA-7jxh-36q5-gcqv","https://github.com/containerd/containerd","https://github.com/containerd/containerd/releases/tag/v1.7.35","https://github.com/containerd/containerd/releases/tag/v2.0.12","https://github.com/containerd/containerd/releases/tag/v2.2.8","https://github.com/containerd/containerd/releases/tag/v2.3.5"],"sourceUrl":"https://github.com/advisories/GHSA-7jxh-36q5-gcqv","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-7jxh-36q5-gcqv","identifiers":["GHSA-7jxh-36q5-gcqv","CVE-2026-53495","GO-2026-6444"]},"retained":false,"historicalAffected":[]},{"revision":"a0958f41c04743f99e62f113d0ebf067","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6444","aliases":["CVE-2026-53495","GHSA-7jxh-36q5-gcqv"],"title":"containerd: CRI ExecSync Goroutine Leak Leads to Node-Level Denial of Service in github.com/containerd/containerd","description":"containerd: CRI ExecSync Goroutine Leak Leads to Node-Level Denial of Service in github.com/containerd/containerd","state":0,"publishedAt":"2026-09-16T16:56:22+00:00","modifiedAt":"2026-09-17T17:30:11.2493247+00:00","affected":[{"ecosystem":"Go","name":"github.com/containerd/containerd","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.7.35"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/containerd/containerd/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.0.12"},{"kind":"introduced","version":"2.2.0"},{"kind":"fixed","version":"2.2.8"},{"kind":"introduced","version":"2.3.0"},{"kind":"fixed","version":"2.3.5"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/containerd/containerd/security/advisories/GHSA-7jxh-36q5-gcqv","https://github.com/containerd/containerd/releases/tag/v1.7.35","https://github.com/containerd/containerd/releases/tag/v2.0.12","https://github.com/containerd/containerd/releases/tag/v2.2.8","https://github.com/containerd/containerd/releases/tag/v2.3.5"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6444","license":"OSV · upstream source license applies","key":"osv:GO-2026-6444","identifiers":["GO-2026-6444","CVE-2026-53495","GHSA-7jxh-36q5-gcqv"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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