Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-64370
Published: July 27, 2026
Vulnerability identifier: #VU139605
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-2026-64370
CWE-ID: CWE-772
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 reference count leak in do_cpu_nanosleep() when handling an error after creating a POSIX CPU timer. A local user can trigger a failure in posix_cpu_timer_set() to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-64370
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/7776f9226e99eb49d97492b0b445027cfcb189da
- https://git.kernel.org/stable/c/87bd2ad568e15b90d5f7d4bcd70342d05dad649c
- https://git.kernel.org/stable/c/8a270b1258797f61b61da44f8bfd41a581b5c85b
- https://git.kernel.org/stable/c/8f06363446c5d043c9a7c008b250040e9de98cf9
- https://git.kernel.org/stable/c/afed3cdc1cca133f804fcf57ff228974f424b23a
- https://git.kernel.org/stable/c/d605d00085adc3fddf67de01dc2a44aebf1a3fb5
- https://git.kernel.org/stable/c/e5ffc638faf5dc7d9dc85c9a95e10bf97442e0c0
- https://git.kernel.org/stable/c/eb4cec29a78334d09bcfb41c0660cdd62ba05843