CVE-2026-45929: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: 08857b5ec5d91d83e69e40a36554a8c7557b7301 преди 3e4fbcb4e078915367ba5576cd70d76dbc970f95; 08857b5ec5d91d83e69e40a36554a8c7557b7301 преди 442915c96a9bff1c7080e2aedabb1c03faa28d81; 08857b5ec5d91d83e69e40a36554a8c7557b7301 преди a5ec7baa44ea3a1d6aa0ca31c0ad82edf9affe41
• Linux Linux: 6.16; преди 6.16; 6.18.14 до 6.18.*; 6.19.4 до 6.19.*; 7.0 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-45929
• https://nvd.nist.gov/vuln/detail/CVE-2026-45929
• https://git.kernel.org/stable/c/3e4fbcb4e078915367ba5576cd70d76dbc970f95
• https://git.kernel.org/stable/c/442915c96a9bff1c7080e2aedabb1c03faa28d81
• https://git.kernel.org/stable/c/a5ec7baa44ea3a1d6aa0ca31c0ad82edf9affe41