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CVE-2026-46238

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: batman-adv: stop caching unowned originator pointers in BAT IV BAT IV keeps the last-hop neighbor address in each neigh_node, b…

Published May 28, 2026EPSS 0.41%

Overview

CVE-2026-46238 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: stop caching unowned originator pointers in BAT IV

BAT IV keeps the last-hop neighbor address in each neigh_node, but some

paths also cache an originator pointer derived from a temporary lookup.

That pointer is not owned by the neigh_node and may no longer refer to a

live originator entry after purge handling runs.

Stop storing the auxiliary originator pointer in the BAT IV neighbor

state. When BAT IV needs the neighbor originator data, resolve it from

the stored neighbor address and drop the reference again after use.

[sven: avoid bonding logic for outgoing OGM]

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/09dc0d1a12222ffca6481916eab3cfea477b9620Refgit.kernel.org/stable/c/384e3050a42be9085d50507b4d5f8266a588d742Refgit.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38Refgit.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006Refgit.kernel.org/stable/c/86b2b58d7c228d850c8c78e4144e6123e8ed2718Refgit.kernel.org/stable/c/8c16c68fdbb69778f8d04f650340c3f4d1518f8eRefgit.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374afRefgit.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46238?

CVE-2026-46238 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-2026-46238?

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-2026-46238?

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-2026-46238?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46238 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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