Resource exhaustion in containerd - CVE-2026-53495
Published: September 6, 2026
Vulnerability identifier: #VU147164
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-53495
CWE-ID: CWE-400
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the containerd CRI plugin ExecSync I/O drain phase when handling ExecSync calls involving long-lived background child processes. A local user can repeatedly invoke ExecSync calls with long-lived background child processes to cause a denial of service.
Only Linux systems with the CRI plugin enabled are affected.
Affected software
containerd
How to mitigate CVE-2026-53495
Install security update from vendor's website.
containerd - addressed in versions 1.7.35, 2.0.12, 2.2.8, 2.3.5