{
  "cveId": "CVE-2026-53495",
  "url": "https://patchblox.com/security/cve/CVE-2026-53495",
  "summary": "CVE-2026-53495 is fixed in 8 products on 1 platform, first by OPENSUSE-SU-2026:21835-1, released September 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "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\u0027s 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.",
  "published": "2026-09-14T13:06:15Z",
  "severity": "Moderate",
  "cwe": "Uncontrolled Resource Consumption",
  "epss": 0.00162,
  "epssPercentile": 0.05366,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53495",
  "fixes": [
    {
      "platform": "linux",
      "product": "containerd",
      "release": "Debian 14",
      "fixedVersion": "2.1.9\u002Bds1-4",
      "fix": "DEBIAN-CVE-2026-53495",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53495",
      "released": "2026-10-10T22:48:57Z"
    },
    {
      "platform": "linux",
      "product": "containerd",
      "release": "amzn 2023",
      "fixedVersion": "2.3.5-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3168",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3168",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "containerd-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "2.3.5-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3168",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3168",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "containerd-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "2.3.5-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3168",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3168",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "containerd-stress",
      "release": "amzn 2023",
      "fixedVersion": "2.3.5-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3168",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3168",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "containerd-stress-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "2.3.5-1.amzn2023.0.1",
      "fix": "ALAS2023-2026-3168",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3168",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "govulncheck-vulndb",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "0.0.20260916T180043-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21897-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21897-1",
      "released": "2026-09-21T12:36:27Z"
    },
    {
      "platform": "linux",
      "product": "govulncheck-vulndb",
      "release": "sles 16.0",
      "fixedVersion": "0.0.20260916T180043-160000.1.1",
      "fix": "SUSE-SU-2026:23863-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23863-1",
      "released": "2026-09-21T12:24:57Z"
    },
    {
      "platform": "linux",
      "product": "hauler",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.1.1-bp160.1.1",
      "fix": "OPENSUSE-SU-2026:22116-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22116-1",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "trivy",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "0.74.0-160000.3.1",
      "fix": "OPENSUSE-SU-2026:21835-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21835-1",
      "released": "2026-09-14T13:06:15Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}