Race condition in Linux kernel - CVE-2026-31642
Published: April 25, 2026
Vulnerability identifier: #VU127756
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-31642
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper synchronization in rxrpc call removal from the rxnet->calls list when reading /proc/net/rxrpc/calls. A local user can trigger access to the procfs entry during concurrent call deletion to cause a denial of service.
How to mitigate CVE-2026-31642
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/146d4ab94cf129ee06cd467cb5c71368a6b5bad6
- https://git.kernel.org/stable/c/3be718f659683ad89fad6f1eb66bee99727cae64
- https://git.kernel.org/stable/c/93fc15be44a35b8e3c58d0238ac0d9b7c53465ff
- https://git.kernel.org/stable/c/ac5f54691be06a32246179d41be2d73598036deb
- https://git.kernel.org/stable/c/c63abf25203b50243fe228090526f9dbf37727bd