CVE-2026-46212batman-adv: bla: prevent use-after-free when deleting 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: 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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 23721387c409087fd3b97e274f34d3ddc0970b74 builds before 1d4b241482d9025c537afb3c7c8419c72c0e0c82; from 23721387c409087fd3b97e274f34d3ddc0970b74 before a1a99837bb6169cfb9187abaa2005e8f12079426; from 23721387c409087fd3b97e274f34d3ddc0970b74 before b88c865dcf6e9f20bfe66a360d4b62941ef769b8; 23721387c409087fd3b97e274f34d3ddc0970b74 builds before 368449e467d5f1e2c2e987bf2bd57000ba75e10b; 23721387c409087fd3b97e274f34d3ddc0970b74 builds before 6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472; 23721387c409087fd3b97e274f34d3ddc0970b74 builds before 00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401; 23721387c409087fd3b97e274f34d3ddc0970b74 builds before 0cc9847c64cb6e61118bc78c9187c8209a7197fa; 23721387c409087fd3b97e274f34d3ddc0970b74 builds before 4ae1709a314060a196981b344610d023ea841e57 | 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/1d4b241482d9025c537afb3c7c8419c72c0e0c82patch
- https://git.kernel.org/stable/c/a1a99837bb6169cfb9187abaa2005e8f12079426patch
- https://git.kernel.org/stable/c/b88c865dcf6e9f20bfe66a360d4b62941ef769b8patch
- https://git.kernel.org/stable/c/368449e467d5f1e2c2e987bf2bd57000ba75e10bpatch
- https://git.kernel.org/stable/c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472patch
- https://git.kernel.org/stable/c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401patch
- https://git.kernel.org/stable/c/0cc9847c64cb6e61118bc78c9187c8209a7197fapatch
- https://git.kernel.org/stable/c/4ae1709a314060a196981b344610d023ea841e57patch
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.