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CVE-2026-46212

8.8 · HIGH

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 bac…

Published May 28, 2026CWE-416EPSS 0.40%

Overview

CVE-2026-46212 is a high-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401Refgit.kernel.org/stable/c/0cc9847c64cb6e61118bc78c9187c8209a7197faRefgit.kernel.org/stable/c/1d4b241482d9025c537afb3c7c8419c72c0e0c82Refgit.kernel.org/stable/c/368449e467d5f1e2c2e987bf2bd57000ba75e10bRefgit.kernel.org/stable/c/4ae1709a314060a196981b344610d023ea841e57Refgit.kernel.org/stable/c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472Refgit.kernel.org/stable/c/a1a99837bb6169cfb9187abaa2005e8f12079426Refgit.kernel.org/stable/c/b88c865dcf6e9f20bfe66a360d4b62941ef769b8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46212?

CVE-2026-46212 is a high-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-46212?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-46212?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-46212?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46212 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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