CVE-2026-80845xfrm: avoid lock inversion in nat keepalive work
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 9 days later
· 9 days later
Published
- 45 days later
· 45 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae – < ea09210462316e5235a25eccb11ad0708d86615e
- affected f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae – < 5c86c895d1cac81a71ead3005084c6265cf6a7a5
- affected f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae – < 89ef3a2e1e4682ab82b0455ce113f8c39fb9e50d
- affected f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae – < a9fa05b7a1246797748d15771052639e0d3cabf1
- affected f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae – < 763fe700b7c58ad64fe5202c5638848244dd4127
- affected 6.11
- unaffected < 6.11
- unaffected 6.12.108 – ≤ 6.12.*
- unaffected 6.18.49 – ≤ 6.18.*
- unaffected 7.1.13 – ≤ 7.1.*
- unaffected 7.2.3 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References5
- https://git.kernel.org/stable/c/ea09210462316e5235a25eccb11ad0708d86615e (opens in a new tab)
- https://git.kernel.org/stable/c/5c86c895d1cac81a71ead3005084c6265cf6a7a5 (opens in a new tab)
- https://git.kernel.org/stable/c/89ef3a2e1e4682ab82b0455ce113f8c39fb9e50d (opens in a new tab)
- https://git.kernel.org/stable/c/a9fa05b7a1246797748d15771052639e0d3cabf1 (opens in a new tab)
- https://git.kernel.org/stable/c/763fe700b7c58ad64fe5202c5638848244dd4127 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-71295 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-80845)Record last updated .