Answer in brief
CVE-2026-53495 records a Medium severity (CVSS 6.8) vulnerability in containerd CRI ExecSync Goroutine Leak Leading to Node-Level Denial of Service. The current sources do not mark it as known exploited. The current feed maps containerd/containerd (generic), github.com/containerd/containerd (go), github.com/containerd/containerd (go), github.com/containerd/containerd/v2 (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps containerd/containerd (generic), github.com/containerd/containerd (go), github.com/containerd/containerd (go), github.com/containerd/containerd/v2 (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| containerd/containerdgeneric | <1.7.35 || >=2.0.0 <2.0.12 || >=2.2.0 <2.2.8 || >=2.3.0 <2.3.5 | 1.7.35, 2.0.12, 2.2.8, 2.3.5 |
| github.com/containerd/containerdgo | <1.7.35 | 1.7.35 |
| github.com/containerd/containerdgo | >=0 <1.7.35 | 1.7.35 |
| github.com/containerd/containerd/v2go | <2.0.12 | 2.0.12 |
| github.com/containerd/containerd/v2go | >=2.2.0,<2.2.8 | 2.2.8 |
| github.com/containerd/containerd/v2go | >=2.3.0,<2.3.5 | 2.3.5 |
| github.com/containerd/containerd/v2go | >=0 <2.0.12 | 2.0.12 |
| github.com/containerd/containerd/v2go | >=2.2.0 <2.2.8 | 2.2.8 |
| github.com/containerd/containerd/v2go | >=2.3.0 <2.3.5 | 2.3.5 |
| github.com/containerd/containerd/v2go | >=0 <2.0.12 >=2.2.0 <2.2.8 >=2.3.0 <2.3.5 | 2.0.12, 2.2.8, 2.3.5 |
Published upstream
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 9, 2026
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.
Quoted source text, attributed separately from HOL analysis.