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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.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-28 | Updated 2026-06-01 | Assigner Linux




HIGH: 8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Product status

Default status
unaffected

23721387c409087fd3b97e274f34d3ddc0970b74 (git) before 1d4b241482d9025c537afb3c7c8419c72c0e0c82
affected

23721387c409087fd3b97e274f34d3ddc0970b74 (git) before a1a99837bb6169cfb9187abaa2005e8f12079426
affected

23721387c409087fd3b97e274f34d3ddc0970b74 (git) before b88c865dcf6e9f20bfe66a360d4b62941ef769b8
affected

23721387c409087fd3b97e274f34d3ddc0970b74 (git) before 368449e467d5f1e2c2e987bf2bd57000ba75e10b
affected

23721387c409087fd3b97e274f34d3ddc0970b74 (git) before 6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472
affected

23721387c409087fd3b97e274f34d3ddc0970b74 (git) before 00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401
affected

23721387c409087fd3b97e274f34d3ddc0970b74 (git) before 0cc9847c64cb6e61118bc78c9187c8209a7197fa
affected

23721387c409087fd3b97e274f34d3ddc0970b74 (git) before 4ae1709a314060a196981b344610d023ea841e57
affected

Default status
affected

3.5
affected

Any version before 3.5
unaffected

5.10.258 (semver)
unaffected

5.15.209 (semver)
unaffected

6.1.175 (semver)
unaffected

6.6.140 (semver)
unaffected

6.12.90 (semver)
unaffected

6.18.32 (semver)
unaffected

7.0.9 (semver)
unaffected

7.1-rc4 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/1d4b241482d9025c537afb3c7c8419c72c0e0c82

git.kernel.org/...c/a1a99837bb6169cfb9187abaa2005e8f12079426

git.kernel.org/...c/b88c865dcf6e9f20bfe66a360d4b62941ef769b8

git.kernel.org/...c/368449e467d5f1e2c2e987bf2bd57000ba75e10b

git.kernel.org/...c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472

git.kernel.org/...c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401

git.kernel.org/...c/0cc9847c64cb6e61118bc78c9187c8209a7197fa

git.kernel.org/...c/4ae1709a314060a196981b344610d023ea841e57

cve.org (CVE-2026-46212)

nvd.nist.gov (CVE-2026-46212)

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