Memory leak in Linux kernel - CVE-2026-31643
Published: April 25, 2026
Vulnerability identifier: #VU127757
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-2026-31643
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 rxrpc_preparse_xdr_yfs_rxgk() when parsing a crafted rxrpc token. A local user can supply a malformed token that triggers an error path to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-31643
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3