In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix integer overflow in rxgk_verify_response() In rxgk_verify_response(), there's a potential integer overflow due to rounding up token_len before checking it, thereby allowing the length check to be bypassed. Fix this by checking the unrounded value against len too (len is limited as the response must fit in a single UDP packet).

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. Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Fix deferred kernel Red Hat Enterprise Linux 7 Fix deferred kernel-rt Red Hat Enterprise Linux 8 Fix deferred kernel Red Hat Enterprise Linux 8 Fix deferred kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-31633 https://nvd.nist.gov/vuln/detail/CVE-2026-31633 https://lore.kernel.org/linux-cve-announce/2026042454-CVE-2026-31633-8b07@gregkh/T