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Vulnerability record · CVE-2026-46212 · published 28 May 2026

CVE-2026-46212: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

8.8 CVSS 3.1 High EPSS 0.40% · top 68.3% CWE-416 · Use after free
8.8CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401 Patch
https://git.kernel.org/stable/c/0cc9847c64cb6e61118bc78c9187c8209a7197fa Patch
https://git.kernel.org/stable/c/1d4b241482d9025c537afb3c7c8419c72c0e0c82 Patch
https://git.kernel.org/stable/c/368449e467d5f1e2c2e987bf2bd57000ba75e10b Patch
https://git.kernel.org/stable/c/4ae1709a314060a196981b344610d023ea841e57 Patch
https://git.kernel.org/stable/c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472 Patch
https://git.kernel.org/stable/c/a1a99837bb6169cfb9187abaa2005e8f12079426 Patch
https://git.kernel.org/stable/c/b88c865dcf6e9f20bfe66a360d4b62941ef769b8 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-46212), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.