CVE-2026-63919
Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: input: hold netns during deferred transport reinjection Transport-mode reinjection stores a struct net pointer in skb->cb and uses it later from xfrm_trans_reinject(). That pointer must stay valid until the deferred callback runs. Take a netns reference when queueing deferred reinjection work and drop it after the callback completes. Use maybe_get_net() so the queueing path does not revive a namespace that is already being torn down. This keeps the existing workqueue design and fixes the netns lifetime handling in one place for all users of xfrm_trans_queue_net().
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://git.kernel.org/stable/c/2df7059a18afb7d3aee6c36cad5d371c198111d4
- https://git.kernel.org/stable/c/48ce101cd630d6745b6923b5bad8358bc4c119da
- https://git.kernel.org/stable/c/55ddfc41451f01c588089cd74957a05311b6f202
- https://git.kernel.org/stable/c/7ee59eda8820b758ed29e1cd3222359c7b97302c
- https://git.kernel.org/stable/c/8dfabcba6a943a7a02ebe1e1637c361ba96acbaa
- https://git.kernel.org/stable/c/9f67a36e91bb50d358760f381f233913fe5c09f8
- https://git.kernel.org/stable/c/9f7ebb45a83afc3216e855e57d51bb4bc9b5232e
- https://git.kernel.org/stable/c/c16f74dc1d75d0e2e7670076d5375deda110ebeb
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.