Memory leak in Linux kernel - CVE-2026-80903
Published: September 5, 2026
Vulnerability identifier: #VU147016
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80903
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 improper cleanup in xe_oa_config_locked() when handling an OA configuration ioctl after OA configuration emission fails. A local user can invoke configuration ioctls that result in repeated unreleased sync entries and fence references to cause a denial of service.
The failure can occur during fence allocation, configuration-buffer allocation, or batch submission before the point of no return.
Affected software
Linux kernel
How to mitigate CVE-2026-80903
Install security update from vendor's repository.