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().
Does this matter?
Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/6725c523a35eeca611ff37e7d4a8712fae92aefdPatch
- https://git.kernel.org/stable/c/7b7ebb7222a5524ce58e48cc9c6d688320ea6cfePatch
- https://git.kernel.org/stable/c/7b8fbcee3184d848b5aee085ca16d0cf05c9b641Patch
- https://git.kernel.org/stable/c/a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbePatch
- https://git.kernel.org/stable/c/ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8dPatch
- https://git.kernel.org/stable/c/afb5436f6028fd68f408f189230fbaa19c910d72Patch
- https://git.kernel.org/stable/c/b65365d2b1e6095c538d49baeb140dd1c166c1b3Patch
- https://git.kernel.org/stable/c/cf6b604011591865ae39ac82de8978c1120d17afPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.