Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: prevent use-after-free when deleting claims When batadv_bla_del_backbone_claims() removes all claims for a backbone, it does this by dropping the link entry in the hash list. This list entry itself was one of the references which need to be dropped at the same time via batadv_claim_put(). But the batadv_claim_put() must not be done before the last access to the claim object in this function. Otherwise the claim might be freed already by the batadv_claim_release() function before the list entry was dropped.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401 Patch
- git.kernel.org/stable/c/0cc9847c64cb6e61118bc78c9187c8209a7197fa Patch
- git.kernel.org/stable/c/1d4b241482d9025c537afb3c7c8419c72c0e0c82 Patch
- git.kernel.org/stable/c/368449e467d5f1e2c2e987bf2bd57000ba75e10b Patch
- git.kernel.org/stable/c/4ae1709a314060a196981b344610d023ea841e57 Patch
- git.kernel.org/stable/c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472 Patch
- git.kernel.org/stable/c/a1a99837bb6169cfb9187abaa2005e8f12079426 Patch
- git.kernel.org/stable/c/b88c865dcf6e9f20bfe66a360d4b62941ef769b8 Patch
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 20 · as of 15 November 2026
- CWE
- CWE-416
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