CVE-2026-53495

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. This issue is fixed in versions 1.7.35, 2.0.12, 2.2.8, and 2.3.5.

References

https://github.com/containerd/containerd/security/advisories/GHSA-7jxh-36q5-gcqv

https://github.com/containerd/containerd/releases/tag/v2.3.5

https://github.com/containerd/containerd/releases/tag/v2.2.8

https://github.com/containerd/containerd/releases/tag/v2.0.12

https://github.com/containerd/containerd/commit/ff39a972369e2f12fae561a58d658bbf8f2bc318

https://github.com/containerd/containerd/commit/eebea8c4c912f44b656c8295c9e6607a19b76650

https://github.com/containerd/containerd/commit/9ec55f024041d0641f6d79841e45c8781141ddaa

https://github.com/containerd/containerd/commit/5a2a3a759b0d2ad8c821b33c3afc20890daf6d81

https://github.com/containerd/containerd/commit/22ccf4314d1fe0834f8e28f10d37d5305ef9880c

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-77684

Details

Source: Mitre, NVD

Named Vulnerability: GO-2026-6444Named Vulnerability: GHSA-7jxh-36q5-gcqv

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS