Race condition in Linux kernel - CVE-2026-53361
Published: July 7, 2026
Vulnerability identifier: #VU136960
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-53361
CWE-ID: CWE-362
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 race condition in unix_gc() and unix_peek_fpl() in the af_unix garbage collection logic when processing MSG_PEEK operations during garbage collection scheduling. A local user can trigger concurrent garbage collection activity to cause a denial of service.
The issue occurs because gc_in_progress may be false while unix_gc() is running, which can confuse garbage collection by MSG_PEEK.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-53361
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.95-1
linux (Debian package) - update to 6.12.95-1