CVE-2026-53495

mediumpriority · track · 0EPSS 0.002 · 5 %ileDEFRUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.16% (5th) EPSS
CVSS 6.8 · medium
Is it mine?
7 products
Check your exposure
Who says so?
3 sources
osv · cert_bund · certfr

EPSS · scored 2026-10-27

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

6.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v4.06.8mediumCVSS: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:Xsecondary · security-advisories@github.com
v4.04.3mediumCVSS: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:U/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:Xsecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USprimaryCWE-400US
03

affected products (7)

Products and version ranges known to be affected.

04

advisories (4)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-3494Docker Desktop: Schwachstelle ermöglicht Denial of ServiceDeutsch2026-09-21csaf · cert_bundDE

    Ein lokaler Angreifer kann eine Schwachstelle in Docker Desktop ausnutzen, um einen Denial of Service Angriff durchzuführen.

  • GHSA-7jxh-36q5-gcqvcontainerd: CRI ExecSync Goroutine Leak Leads to Node-Level Denial of Service2026-09-09ghsa · osvUS

    ### Impact A bug in containerd's CRI ExecSync implementation allows exec probes and lifecycle hooks with background child processes to keep containerd's stdio-drain goroutines indefinitely blocked. Because the I/O drain phase lacks a default timeout or context cancellation handling, repeated ExecSync invocations (like probes) that include long-lived background processes against a container can cause containerd to leak goroutines and host memory. Over time, this resource exhaustion can cause the containerd daemon to be terminated by the OOM killer, rendering containerd unavailable until it is restarted. This issue affects containerd on Linux systems running with the CRI plugin enabled. Users not using containerd's CRI implementation or not running containers on Linux are not affected. ### Patches This bug has been fixed in containerd 2.3.5, 2.2.8, 2.0.12, and 1.7.35. Users should update to these versions to resolve the issue. ### Workarounds Ensure exec probes and lifecycle hooks do not launch long-lived background child processes. ### Credits The containerd project would like to thank XlabAI Team of Tencent Xuanwu Lab (xlabai@tencent.com), including Guannan Wang, Zhanpeng Liu, Jiashuo Liang, and Guancheng Li, and @IamwhatIamSY who independently discovered and responsibly disclosed this issue in accordance with the [containerd security policy](https://github.com/containerd/project/blob/main/SECURITY.md). ### For more information If there are any questions or comments about this advisory: * Open an issue in [containerd](https://github.com/containerd/containerd/issues/new/choose) * Send an email to [security@containerd.io](mailto:security@containerd.io) To report a security issue in containerd: * [Report a new vulnerability](https://github.com/containerd/containerd/security/advisories/new) * Send an email to [security@containerd.io](mailto:security@containerd.io)

  • CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
  • GO-2026-6444containerd: CRI ExecSync Goroutine Leak Leads to Node-Level Denial of Service in github.com/containerd/containerd2026-09-16vendor · osvUS

    containerd: CRI ExecSync Goroutine Leak Leads to Node-Level Denial of Service in github.com/containerd/containerd

05

also known as (2)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

osvcert_bundcertfrNVDCVE.orgMITRE
published 2026-09-14modified 2026-09-25
08

references (9) nvd

External citations — patches, advisories, analysis.

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