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.

A flaw was found in the `batman-adv` component of the Linux kernel. This vulnerability, a use-after-free, occurs during the process of deleting backbone claims. If exploited, this memory corruption issue could allow an attacker to cause a system crash, leading to a denial of service, or potentially execute unauthorized code.

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-46212 https://nvd.nist.gov/vuln/detail/CVE-2026-46212 https://lore.kernel.org/linux-cve-announce/2026052835-CVE-2026-46212-2bca@gregkh/T