CVE-2026-46233batman-adv: bla: only purge non-released claims
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% 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: batman-adv: bla: only purge non-released claims When batadv_bla_purge_claims() goes through the list of claims, it is only traversing the hash list with an rcu_read_lock(). Due to a potential parallel batadv_claim_put(), it can happen that it encounters a claim which was actually in the process of being released+freed by batadv_claim_release(). In this case, backbone_gw is set to NULL before the delayed RCU kfree is started. Calling batadv_bla_claim_get_backbone_gw() is then no longer allowed because it would cause a NULL-ptr derefence. To avoid this, only claims with a valid reference counter must be purged. All others are already taken care of.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 17 days later
· 17 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 23721387c409087fd3b97e274f34d3ddc0970b74 – < a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe
- affected 23721387c409087fd3b97e274f34d3ddc0970b74 – < 6725c523a35eeca611ff37e7d4a8712fae92aefd
- affected 23721387c409087fd3b97e274f34d3ddc0970b74 – < afb5436f6028fd68f408f189230fbaa19c910d72
- affected 23721387c409087fd3b97e274f34d3ddc0970b74 – < 7b8fbcee3184d848b5aee085ca16d0cf05c9b641
- affected 23721387c409087fd3b97e274f34d3ddc0970b74 – < 7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe
- affected 23721387c409087fd3b97e274f34d3ddc0970b74 – < b65365d2b1e6095c538d49baeb140dd1c166c1b3
- affected 23721387c409087fd3b97e274f34d3ddc0970b74 – < ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d
- affected 23721387c409087fd3b97e274f34d3ddc0970b74 – < cf6b604011591865ae39ac82de8978c1120d17af
- affected 3.5
- unaffected < 3.5
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.140 – ≤ 6.6.*
- unaffected 6.12.90 – ≤ 6.12.*
- unaffected 6.18.32 – ≤ 6.18.*
- unaffected 7.0.9 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe (opens in a new tab)
- https://git.kernel.org/stable/c/6725c523a35eeca611ff37e7d4a8712fae92aefd (opens in a new tab)
- https://git.kernel.org/stable/c/afb5436f6028fd68f408f189230fbaa19c910d72 (opens in a new tab)
- https://git.kernel.org/stable/c/7b8fbcee3184d848b5aee085ca16d0cf05c9b641 (opens in a new tab)
- https://git.kernel.org/stable/c/7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe (opens in a new tab)
- https://git.kernel.org/stable/c/b65365d2b1e6095c538d49baeb140dd1c166c1b3 (opens in a new tab)
- https://git.kernel.org/stable/c/ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d (opens in a new tab)
- https://git.kernel.org/stable/c/cf6b604011591865ae39ac82de8978c1120d17af (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-2026-32751 (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-2026-46233)Record last updated .