CVE-2026-46233 - batman-adv: bla: only purge non-released claims

CVE-2026-46233 - batman-adv: bla: only purge non-released claims

https://cvefeed.io/rssfeed/latest.atom / Thu, 05/28/2026 - 14:25
CVE ID :CVE-2026-46233
Published : May 28, 2026, 10:16 a.m. | 44 minutes ago
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.
Severity: 0.0 | NA
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