CVE-2026-43499 | Linux Kernel up to 6.6.139/6.12.85/6.18.26/7.0.3 rtmutex remove_waiter use after free (WID-SEC-2026-1656)
A vulnerability described as critical has been identified in Linux Kernel up to 6.6.139/6.12.85/6.18.26/7.0.3. This issue affects the function remove_waiter of the component rtmutex. Such manipulation leads to use after free.
This vulnerability is documented as CVE-2026-43499. The attack requires being on the local network. There is not any exploit available.
Upgrading the affected component is recommended.