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Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 40.4%
CVSS Severity
CVSS v3 Score 9.8
Products affected by CVE-2026-52914


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