CVE-2026-80845
CVE CVE-2026-80845EUVD EUVD-2026-71295Published 2026-09-04T15:54:55.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: xfrm: avoid lock inversion in nat keepalive work nat_keepalive_work() walks the state table while xfrm_state_walk() holds net->xfrm.xfrm_state_lock. Its callback then acquires x->lock, which conflicts with the delete path taking the same locks in reverse order via xfrm_state_delete() and __xfrm_state_delete(). This creates an AB-BA deadlock that is reported by lockdep when a NAT keepalive worker races with SA deletion. Fix this by splitting the keepalive walk into two phases. First, collect the candidate states while the walk holds xfrm_state_lock and take a reference on each state. Then, after the walk completes, process each collected state and acquire x->lock without nesting it under xfrm_state_lock.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae <89ef3a2e1e4682ab82b0455ce113f8c39fb9e50d; patch: 6.18.49; 6.11; f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae <5c86c895d1cac81a71ead3005084c6265cf6a7a5; f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae <a9fa05b7a1246797748d15771052639e0d3cabf1; f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae <ea09210462316e5235a25eccb11ad0708d86615e; patch: 0; patch: 6.12.108; patch: 7.2.3; patch: 7.3-rc1; f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae <763fe700b7c58ad64fe5202c5638848244dd4127; patch: 7.1.13
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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