CVE-2026-68341

In the Linux kernel, the following vulnerability has been resolved:

ovpn: fix use after free in unlock_ovpn()

unlockovpn() iterates over the releaselist using llistforeachentry() and drops the peer reference inside the loop body via ovpnpeer_put().

If this drops the last reference, the peer is eventually freed. However, llistforeachentry() reads peer->releaseentry.next in the loop advance expression, which runs after the body. By that time the peer may have already been freed, resulting in a use after free when advancing to the next list entry.

Fix this by using llistforeachentrysafe(), which caches the next pointer before executing the loop body.