CVE-2026-31633

A flaw was found in the Linux kernel's rxrpc component. A potential integer overflow vulnerability exists in the rxgk_verify_response() function. This occurs when the token_len value is rounded up before a critical length check, allowing the check to be bypassed. This could potentially lead to unexpected behavior or resource exhaustion, as the response is intended to fit within a single User Datagram Protocol (UDP) packet.

Integer overflow when sizing RxGK response buffers could lead to undersized allocations; upstream validates token length math. Red Hat recommends kernel updates for rxrpc users.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.