CVE-2026-45929
Published: May 27, 2026
Modified: May 30, 2026
CVSS v3.1
7.8
Description
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.
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected 08857b5ec5d91d83e69e40a36554a8c7557b7301 - < 3e4fbcb4e078915367ba5576cd70d76dbc970f95affected 08857b5ec5d91d83e69e40a36554a8c7557b7301 - < 442915c96a9bff1c7080e2aedabb1c03faa28d81affected 08857b5ec5d91d83e69e40a36554a8c7557b7301 - < a5ec7baa44ea3a1d6aa0ca31c0ad82edf9affe41 |
Linux | Linux | affected 6.16unaffected 0 - < 6.16unaffected 6.18.14 - <= 6.18.*unaffected 6.19.4 - <= 6.19.*unaffected 7.0 - <= * |
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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