Linux Kernel Security Update Advisory (CVE-2026-31635)

Overview

A security update has been released that resolves a denial-of-service vulnerability, CVE-2026-31635, in the Linux Kernel. the vulnerability is related to a modification to the RESPONSE authenticator length check in rxrpc (a kernel network communication-related function).

Affected Products

• Linux Kernel 6.19 and later but earlier than 6.19.13.
• Linux Kernel 6.16.1 and later but earlier than 6.18.23.

Mitigation

applying the latest updates will patch the CVE-2026-31635 vulnerability. Linux Kernel 6.19.13 and later and 6.18.23 and later are listed as resolved.

Notes

• cVE-2026-31635 Details: rxrpc: fix oversized RESPONSE authenticator length check.
• CVE-2026-31635 Detail.