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CVE-2026-46233

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: only purge non-released claims When batadv_bla_purge_claims() goes through the list of claims, it is only trav…

Published May 28, 2026CWE-476EPSS 0.16%

Overview

CVE-2026-46233 is a medium-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

batman-adv: bla: only purge non-released claims

When batadv_bla_purge_claims() goes through the list of claims, it is only

traversing the hash list with an rcu_read_lock(). Due to a potential

parallel batadv_claim_put(), it can happen that it encounters a claim which

was actually in the process of being released+freed by

batadv_claim_release(). In this case, backbone_gw is set to NULL before the

delayed RCU kfree is started. Calling batadv_bla_claim_get_backbone_gw() is

then no longer allowed because it would cause a NULL-ptr derefence.

To avoid this, only claims with a valid reference counter must be purged.

All others are already taken care of.

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/6725c523a35eeca611ff37e7d4a8712fae92aefdRefgit.kernel.org/stable/c/7b7ebb7222a5524ce58e48cc9c6d688320ea6cfeRefgit.kernel.org/stable/c/7b8fbcee3184d848b5aee085ca16d0cf05c9b641Refgit.kernel.org/stable/c/a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbeRefgit.kernel.org/stable/c/ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8dRefgit.kernel.org/stable/c/afb5436f6028fd68f408f189230fbaa19c910d72Refgit.kernel.org/stable/c/b65365d2b1e6095c538d49baeb140dd1c166c1b3Refgit.kernel.org/stable/c/cf6b604011591865ae39ac82de8978c1120d17af

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46233?

CVE-2026-46233 is a medium-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-46233?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-46233?

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-2026-46233?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46233 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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