CVE-2026-17523

Local privilege escalation in the Linux kernel's CAN Broadcast Manager (BCM) module allows an unprivileged local user to execute arbitrary code in kernel context. The flaw stems from an expired pointer dereference (CWE-825) in the handling of tasklets and timers, leading to use-after-free. No active exploitation or public exploit code has been identified, but successful exploitation results in full root compromise of the system.