CVE-2026-46233
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.
Affected versions
Linux kernel versions
3.5
and later are affected. Fixed in
5.10.258,
5.15.209,
6.1.175,
6.6.140,
6.12.90,
6.18.32,
7.0.9,
7.1-rc4
and their respective stable series.
References
The following references provide additional information about CVE-2026-46233 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/6725c523a35eeca611ff37e7d4a8712fae92aefd
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PatchKernel patch commithttps://git.kernel.org/stable/c/7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe
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PatchKernel patch commithttps://git.kernel.org/stable/c/7b8fbcee3184d848b5aee085ca16d0cf05c9b641
Frequently asked questions
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What is CVE-2026-46233?
CVE-2026-46233 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.5 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-46233 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-46233?
Yes — CVE-2026-46233 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 3.5 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-46233 actively exploited?
No — CVE-2026-46233 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.