CVE-2026-68341
In the Linux kernel, the following vulnerability has been resolved: ovpn: fix use after free in unlock_ovpn() unlock_ovpn() iterates over the release_list using llist_for_each_entry() and drops the peer reference inside the loop body via ovpn_peer_put(). If this drops the last reference, the peer is eventually freed. However, llist_for_each_entry() reads peer->release_entry.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 llist_for_each_entry_safe(), which caches the next pointer before executing the loop body.
- Score
- CVSS 3.1 8.8 High
- Status
- Received - 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- Published
- 2026-08-10
- Last modified
- 2026-08-17
Affected products
References
- https://git.kernel.org/stable/c/4cdb209f12a89c5faf9be0c45edb90ccdf65db0c
- https://git.kernel.org/stable/c/5b96227c0e8b212b74838424c929fc889aedb555
- https://git.kernel.org/stable/c/e1ad6fe5db719874efa45b2caf9934552e09fc43
