- 7.8HighCVSS base score
- 0.10%Exploitation in 30 daysEPSS · top 99% 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: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() Fix the race by pruning the bin while still holding xfrm_policy_lock, before dropping it. Use __xfrm_policy_inexact_prune_bin() directly since the lock is already held. The wrapper xfrm_policy_inexact_prune_bin() becomes unused and is removed. Race: CPU0 (XFRM_MSG_DELPOLICY) CPU1 (XFRM_MSG_NEWSPDINFO) ========================== ========================== xfrm_policy_bysel_ctx(): spin_lock_bh(xfrm_policy_lock) bin = xfrm_policy_inexact_lookup() __xfrm_policy_unlink(pol) spin_unlock_bh(xfrm_policy_lock) xfrm_policy_kill(ret) // wide window, lock not held xfrm_hash_rebuild(): spin_lock_bh(xfrm_policy_lock) __xfrm_policy_inexact_flush(): kfree_rcu(bin) // bin freed spin_unlock_bh(xfrm_policy_lock) xfrm_policy_inexact_prune_bin(bin) // UAF: bin is freed
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 5 months later
· 5 months 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.10% · top 99% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 6be3b0db6db82cf056a72cc18042048edd27f8ee – < 8fc536e9f6856230f19c7d13e71af064b6a77b22
- affected 6be3b0db6db82cf056a72cc18042048edd27f8ee – < c4c1ea36d83bf3c4569468ca5b8b614fda1bf821
- affected 6be3b0db6db82cf056a72cc18042048edd27f8ee – < 25c8c7fb3b0b9668c7d05e209f58c158d2b020c7
- affected 6be3b0db6db82cf056a72cc18042048edd27f8ee – < 42827d03f8009a6a218bacab153e21f39d6a121c
- affected 6be3b0db6db82cf056a72cc18042048edd27f8ee – < 88697cf980222d5906a37bf47662dac0732e2a0f
- affected 6be3b0db6db82cf056a72cc18042048edd27f8ee – < b5316e2b8614a87d8736941972441cb47bfd4491
- affected 6be3b0db6db82cf056a72cc18042048edd27f8ee – < ec82ea4eb220164d854f8734ca5a35e23e577b94
- affected 6be3b0db6db82cf056a72cc18042048edd27f8ee – < 7f2d76c9c03257c0782afef9d95321fa04096f60
- affected 5.0
- unaffected < 5.0
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.94 – ≤ 6.12.*
- unaffected 6.18.36 – ≤ 6.18.*
- unaffected 7.0.13 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References11
- https://git.kernel.org/stable/c/8fc536e9f6856230f19c7d13e71af064b6a77b22 (opens in a new tab)
- https://git.kernel.org/stable/c/c4c1ea36d83bf3c4569468ca5b8b614fda1bf821 (opens in a new tab)
- https://git.kernel.org/stable/c/25c8c7fb3b0b9668c7d05e209f58c158d2b020c7 (opens in a new tab)
- https://git.kernel.org/stable/c/42827d03f8009a6a218bacab153e21f39d6a121c (opens in a new tab)
- https://git.kernel.org/stable/c/88697cf980222d5906a37bf47662dac0732e2a0f (opens in a new tab)
- https://git.kernel.org/stable/c/b5316e2b8614a87d8736941972441cb47bfd4491 (opens in a new tab)
- https://git.kernel.org/stable/c/ec82ea4eb220164d854f8734ca5a35e23e577b94 (opens in a new tab)
- https://git.kernel.org/stable/c/7f2d76c9c03257c0782afef9d95321fa04096f60 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (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-2026-39330 (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-2026-53239)Record last updated .