batman-adv: fix fragment reassembly length accounting

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-52914 · Microsoft / collected KEV context

cve-program · CVE-2026-52914

• https://git.kernel.org/stable/c/e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64
• https://git.kernel.org/stable/c/37be61825b15534a16ff9cfc9546de155b6df982
• https://git.kernel.org/stable/c/975563c5de1123dde1ec7946bf5556d20c89d74e
• https://git.kernel.org/stable/c/f653b040dad1af70fa5cd4fe085e4758925480c9
• https://git.kernel.org/stable/c/e910dbf509125fe51ad68e4fa74dc8ab0a8e787a
• https://git.kernel.org/stable/c/3eb8bcb823391bd58997831b3c9c152a4ba8e255
• https://git.kernel.org/stable/c/fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0
• https://git.kernel.org/stable/c/9cd3f16c320bfdadd4509358122368deb56a5741

No related operational record is retained in the current change model.