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CVE-2026-52914

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix fragment reassembly length accounting batman-adv keeps a running payload length for queued fragments and uses i…

Published Jun 24, 2026CWE-787EPSS 0.51%

Overview

CVE-2026-52914 is a critical-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

batman-adv: fix fragment reassembly length accounting

batman-adv keeps a running payload length for queued fragments and uses it

to validate a fragment chain before reassembly.

That accounting currently allows the accumulated fragment length to be

truncated during updates. As a result, malformed fragment chains can

bypass the intended validation and drive reassembly with inconsistent

length state, leading to a local denial of service.

Fix the accounting by storing the accumulated length in a length-typed

field and rejecting update overflows before the existing validation logic

runs.

The fix was verified against the original reproducer and against valid

fragment reassembly paths.

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/37be61825b15534a16ff9cfc9546de155b6df982Refgit.kernel.org/stable/c/3eb8bcb823391bd58997831b3c9c152a4ba8e255Refgit.kernel.org/stable/c/975563c5de1123dde1ec7946bf5556d20c89d74eRefgit.kernel.org/stable/c/9cd3f16c320bfdadd4509358122368deb56a5741Refgit.kernel.org/stable/c/e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64Refgit.kernel.org/stable/c/e910dbf509125fe51ad68e4fa74dc8ab0a8e787aRefgit.kernel.org/stable/c/f653b040dad1af70fa5cd4fe085e4758925480c9Refgit.kernel.org/stable/c/fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52914?

CVE-2026-52914 is a critical-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-52914?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-52914?

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-2026-52914?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52914 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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