CVE-2026-52914
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.
Affected versions
Linux kernel versions
3.13
and later are affected. Fixed in
5.10.258,
5.15.209,
6.1.175,
6.6.142,
6.12.92,
6.18.34,
7.0.11,
7.1
and their respective stable series.
References
8 totalFrequently asked questions
-
What is CVE-2026-52914?
CVE-2026-52914 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.13 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-52914 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-52914?
Yes — CVE-2026-52914 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 3.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-52914 actively exploited?
No — CVE-2026-52914 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.