CVE Watch8 jul 2026

CVE-2026-52914

In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix fragment reassembly length accounting batman-adv keeps

CVSS

9.8

Crítico

EPSS

0.5%

p41

KEV

—

Exploit Today

0-100

Publicado: 24 jun 2026 · Última mod.: 8 jul 2026 · CWE-787

EPSS · 30d

0.5%EPSS · 30 días0.5%

2026-06-302026-07-17

Descripción técnica

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.

Referencias oficiales

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