CVE-2026-52914
CRITICALDescription
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.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 40% of all known CVEs.
References
- https://git.kernel.org/stable/c/37be61825b15534a16ff9cfc9546de155b6df982
- https://git.kernel.org/stable/c/3eb8bcb823391bd58997831b3c9c152a4ba8e255
- https://git.kernel.org/stable/c/975563c5de1123dde1ec7946bf5556d20c89d74e
- https://git.kernel.org/stable/c/9cd3f16c320bfdadd4509358122368deb56a5741
- https://git.kernel.org/stable/c/e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64
- https://git.kernel.org/stable/c/e910dbf509125fe51ad68e4fa74dc8ab0a8e787a
- https://git.kernel.org/stable/c/f653b040dad1af70fa5cd4fe085e4758925480c9
- https://git.kernel.org/stable/c/fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-28.