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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.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-05-30 | Assigner Linux




HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Product status

Default status
unaffected

08857b5ec5d91d83e69e40a36554a8c7557b7301 (git) before 3e4fbcb4e078915367ba5576cd70d76dbc970f95
affected

08857b5ec5d91d83e69e40a36554a8c7557b7301 (git) before 442915c96a9bff1c7080e2aedabb1c03faa28d81
affected

08857b5ec5d91d83e69e40a36554a8c7557b7301 (git) before a5ec7baa44ea3a1d6aa0ca31c0ad82edf9affe41
affected

Default status
affected

6.16
affected

Any version before 6.16
unaffected

6.18.14 (semver)
unaffected

6.19.4 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/3e4fbcb4e078915367ba5576cd70d76dbc970f95

git.kernel.org/...c/442915c96a9bff1c7080e2aedabb1c03faa28d81

git.kernel.org/...c/a5ec7baa44ea3a1d6aa0ca31c0ad82edf9affe41

cve.org (CVE-2026-45929)

nvd.nist.gov (CVE-2026-45929)

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