CVE-2026-53495
containerd CRI ExecSync Goroutine Leak Leading to Node-Level Denial of Service
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Timeline
ID reserved
By GitHub_M
- 3 months later
· 3 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | Medium6.8 | 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 |
| NVDNVD · Awaiting Analysis | 4.0 | Medium6.8 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Weakness
Affected products
- affected < 1.7.35
- affected >= 2.0.0, < 2.0.12
- affected >= 2.2.0, < 2.2.8
- affected >= 2.3.0, < 2.3.5
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/containerd/containerdGHSA-7jxh-36q5-gcqv (opens in a new tab)
- Gogithub.com/containerd/containerd/v2GHSA-7jxh-36q5-gcqv (opens in a new tab)
References (9)
- https://github.com/containerd/containerd/security/advisories/GHSA-7jxh-36q5-gcqv (opens in a new tab)x_refsource_CONFIRM
- https://github.com/containerd/containerd/commit/22ccf4314d1fe0834f8e28f10d37d5305ef9880c (opens in a new tab)x_refsource_MISC
- https://github.com/containerd/containerd/commit/5a2a3a759b0d2ad8c821b33c3afc20890daf6d81 (opens in a new tab)x_refsource_MISC
- https://github.com/containerd/containerd/commit/9ec55f024041d0641f6d79841e45c8781141ddaa (opens in a new tab)x_refsource_MISC
- https://github.com/containerd/containerd/commit/eebea8c4c912f44b656c8295c9e6607a19b76650 (opens in a new tab)x_refsource_MISC
- https://github.com/containerd/containerd/commit/ff39a972369e2f12fae561a58d658bbf8f2bc318 (opens in a new tab)x_refsource_MISC
- https://github.com/containerd/containerd/releases/tag/v2.0.12 (opens in a new tab)x_refsource_MISC
- https://github.com/containerd/containerd/releases/tag/v2.2.8 (opens in a new tab)x_refsource_MISC
- https://github.com/containerd/containerd/releases/tag/v2.3.5 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-7jxh-36q5-gcqv (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-53495)Record last updated .