CVE-2026-46233batman-adv: bla: only purge non-released claims
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Jun 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 23721387c409087fd3b97e274f34d3ddc0970b74 before a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe; 23721387c409087fd3b97e274f34d3ddc0970b74 builds before 6725c523a35eeca611ff37e7d4a8712fae92aefd; from 23721387c409087fd3b97e274f34d3ddc0970b74 before afb5436f6028fd68f408f189230fbaa19c910d72; 23721387c409087fd3b97e274f34d3ddc0970b74 builds before 7b8fbcee3184d848b5aee085ca16d0cf05c9b641; 23721387c409087fd3b97e274f34d3ddc0970b74 builds before 7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe; from 23721387c409087fd3b97e274f34d3ddc0970b74 before b65365d2b1e6095c538d49baeb140dd1c166c1b3; from 23721387c409087fd3b97e274f34d3ddc0970b74 before ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d; from 23721387c409087fd3b97e274f34d3ddc0970b74 before cf6b604011591865ae39ac82de8978c1120d17af | CNA record |
linux linux_kernel linux:linux_kernel | from 3.5 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.90; from 6.13 before 6.18.32; from 6.19 before 7.0.9; 7.1; and 2 more ranges | NVD |
References
- https://git.kernel.org/stable/c/a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbepatch
- https://git.kernel.org/stable/c/6725c523a35eeca611ff37e7d4a8712fae92aefdpatch
- https://git.kernel.org/stable/c/afb5436f6028fd68f408f189230fbaa19c910d72patch
- https://git.kernel.org/stable/c/7b8fbcee3184d848b5aee085ca16d0cf05c9b641patch
- https://git.kernel.org/stable/c/7b7ebb7222a5524ce58e48cc9c6d688320ea6cfepatch
- https://git.kernel.org/stable/c/b65365d2b1e6095c538d49baeb140dd1c166c1b3patch
- https://git.kernel.org/stable/c/ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8dpatch
- https://git.kernel.org/stable/c/cf6b604011591865ae39ac82de8978c1120d17afpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.