Memory leak in Linux kernel - CVE-2026-80811
Published: September 5, 2026
Vulnerability identifier: #VU147107
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80811
CWE-ID: CWE-401
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 a memory leak in the io_uring uring command asynchronous cleanup logic when processing asynchronous io_uring commands. A local user can submit asynchronous commands that reuse cached iovec arrays to cause a denial of service.
The issue manifests when the command cache is full and a command inherits a cached iovec array.
Affected software
Linux kernel
How to mitigate CVE-2026-80811
Install security update from vendor's repository.