In the Linux kernel, the following vulnerability has been resolved: ovpn: fix possible use-after-free in ovpn_net_xmit When building the skb_list in ovpn_net_xmit, skb_share_check will free the original skb if it is shared. The current implementation continues to use the stale skb pointer for subsequent operations: - peer lookup, - skb_dst_drop (even though all segments produced by skb_gso_segment will have a dst attached), - ovpn_peer_stats_increment_tx. Fix this by moving the peer lookup and skb_dst_drop before segmentation so that the original skb is still valid when used. Return early if all segments fail skb_share_check and the list ends up empty. Also switch ovpn_peer_stats_increment_tx to use skb_list.next; the next patch fixes the stats logic.

A flaw was found in the Linux kernel's `ovpn` module. A use-after-free vulnerability exists in the `ovpn_net_xmit` function where a freed `skb` (socket buffer) pointer can be used for subsequent operations. This can occur when `skb_share_check` frees the original `skb` if it is shared, leading to a stale pointer being used. This flaw could potentially lead to system instability, denial of service, or other unspecified impacts.

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-45929 https://nvd.nist.gov/vuln/detail/CVE-2026-45929 https://lore.kernel.org/linux-cve-announce/2026052726-CVE-2026-45929-609a@gregkh/T