CVE-2026-53495

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 95% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.8
EG Score
6.8(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity68% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 14, 2026

Advisory Details (9)

Auto-updated Sep 14, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

containerd 2.3.5

Patch available: containerd/containerd v2.3.5

https://github.com/containerd/containerd/releases/tag/v2.3.5
github_release Patch Available

containerd 2.2.8

Patch available: containerd/containerd v2.2.8

https://github.com/containerd/containerd/releases/tag/v2.2.8
github_release Patch Available

containerd 2.0.12

Patch available: containerd/containerd v2.0.12

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

commit ff39a972369e (containerd/containerd)

Fix landed in containerd/containerd commit ff39a972369e — awaiting tagged release

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

commit eebea8c4c912 (containerd/containerd)

Fix landed in containerd/containerd commit eebea8c4c912 — awaiting tagged release

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

commit 9ec55f024041 (containerd/containerd)

Fix landed in containerd/containerd commit 9ec55f024041 — awaiting tagged release

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

commit 5a2a3a759b0d (containerd/containerd)

Fix landed in containerd/containerd commit 5a2a3a759b0d — awaiting tagged release

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

commit 22ccf4314d1f (containerd/containerd)

Fix landed in containerd/containerd commit 22ccf4314d1f — awaiting tagged release

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

containerd CRI plugin: Unbounded I/O draining in ExecSync causes node-level denial of service · Advisory · containerd/containerd · GitHub

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

Vendor Advisories for CVE-2026-53495(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 1 ecosystem)
Go(2)
PackageVulnerable rangeFixed inDependents
github.com/containerd/containerd—1.7.35—
github.com/containerd/containerd/v2—2.0.12—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 17× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-25 09:43 UTCEG score recompute
  2. 2026-09-24 14:04 UTCEPSS rescore
  3. 2026-09-24 08:19 UTCEG score recompute
  4. 2026-09-24 08:19 UTCVendor advisory
  5. 2026-09-23 17:54 UTCEPSS rescore
  6. 2026-09-23 06:55 UTCEG score recompute
  7. 2026-09-23 06:55 UTCVendor advisory
  8. 2026-09-22 05:30 UTCEG score recompute
  9. 2026-09-22 05:30 UTCVendor advisory
  10. 2026-09-21 04:06 UTCEG score recompute
  11. 2026-09-21 04:06 UTCVendor advisory
  12. 2026-09-20 20:16 UTCEPSS rescore
  13. 2026-09-20 02:42 UTCEG score recompute
  14. 2026-09-20 02:42 UTCVendor advisory
  15. 2026-09-19 01:18 UTCEG score recompute
  16. 2026-09-19 01:18 UTCVendor advisory
  17. 2026-09-18 19:28 UTCEPSS rescore
  18. 2026-09-17 23:54 UTCEG score recompute
  19. 2026-09-17 23:54 UTCVendor advisory
  20. 2026-09-16 21:28 UTCEG score recompute
  21. 2026-09-16 14:08 UTCEPSS rescore
  22. 2026-09-16 05:15 UTCEPSS rescore
  23. 2026-09-14 18:34 UTCEG score recompute
  24. 2026-09-14 17:45 UTCEG score recompute
  25. 2026-09-14 17:31 UTCEG score recompute▲ 6.80
Show 2 more
  1. 2026-09-14 17:30 UTCMITRE cvelistV5CVSS v3 → 6.8 · CVSS v4 → 6.8
  2. 2026-09-09 18:23 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-53495?
CVE-2026-53495 is a medium vulnerability published on September 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…
When was CVE-2026-53495 disclosed?
CVE-2026-53495 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53495 actively exploited?
CVE-2026-53495 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 94.6% of all scored CVEs.
What is the CVSS score of CVE-2026-53495?
CVE-2026-53495 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-53495?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53495, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-53495

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