CVE-2026-43252 | Linux Kernel up to 6.19.5 mptcp net/mptcp/pm_kernel.c __mark_subflow_endp_available privilege escalation (Nessus ID 323086)
A vulnerability was found in Linux Kernel up to 6.1.166/6.6.129/6.12.77/6.18.15/6.19.5. It has been declared as critical. Affected is the function __mark_subflow_endp_available of the file net/mptcp/pm_kernel.c of the component mptcp. Executing a manipulation can lead to privilege escalation.
This vulnerability is registered as CVE-2026-43252. The attack requires access to the local network. No exploit is available.
It is recommended to upgrade the affected component.