CVE-2026-63809 | Linux Kernel up to 7.1.2 Bpf domainname proc_sys_call_handler memory corruption

A vulnerability identified as critical has been detected in Linux Kernel up to 7.1.2. This affects the function proc_sys_call_handler of the file /proc/sys/kernel/domainname of the component Bpf. Performing a manipulation results in memory corruption.

This vulnerability is identified as CVE-2026-63809. The attack is only possible with local access. There is not any exploit available.