CVE-2026-46233
published 2026-05-28CVE-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…
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
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 23721387c409087fd3b97e274f34d3ddc0970b74 < a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe | a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe |
| linux | linux | >= 23721387c409087fd3b97e274f34d3ddc0970b74 < 6725c523a35eeca611ff37e7d4a8712fae92aefd | 6725c523a35eeca611ff37e7d4a8712fae92aefd |
| linux | linux | >= 23721387c409087fd3b97e274f34d3ddc0970b74 < afb5436f6028fd68f408f189230fbaa19c910d72 | afb5436f6028fd68f408f189230fbaa19c910d72 |
| linux | linux | >= 23721387c409087fd3b97e274f34d3ddc0970b74 < 7b8fbcee3184d848b5aee085ca16d0cf05c9b641 | 7b8fbcee3184d848b5aee085ca16d0cf05c9b641 |
| linux | linux | >= 23721387c409087fd3b97e274f34d3ddc0970b74 < 7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe | 7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe |
| linux | linux | >= 23721387c409087fd3b97e274f34d3ddc0970b74 < b65365d2b1e6095c538d49baeb140dd1c166c1b3 | b65365d2b1e6095c538d49baeb140dd1c166c1b3 |
| linux | linux | >= 23721387c409087fd3b97e274f34d3ddc0970b74 < ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d | ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d |
| linux | linux | >= 23721387c409087fd3b97e274f34d3ddc0970b74 < cf6b604011591865ae39ac82de8978c1120d17af | cf6b604011591865ae39ac82de8978c1120d17af |
| linux | linux_kernel | — | — |