batman-adv: fix stale receive device on merged fragments

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

CVE-2026-89951 · Microsoft / collected KEV context

cve-program · CVE-2026-89951

• https://git.kernel.org/stable/c/63d86250fa7cbe22451369bd1c0881dfc8190958
• https://git.kernel.org/stable/c/f830c2dfc1431764db9256b3d5db1695fc9a7f56
• https://git.kernel.org/stable/c/f4b4ae763b5d59319fad62a00c76676758e7dafa
• https://git.kernel.org/stable/c/6df64825f8b199921120c685af2abca14b077331
• https://git.kernel.org/stable/c/a2c272da99c2077088083c14961cf2f1e4506995
• https://git.kernel.org/stable/c/e91d2cc7441d89a45bad73ad9789159c7441cb80
• https://git.kernel.org/stable/c/2dffc8c44b6e3347b3719c6419c07b4a18fea895
• https://git.kernel.org/stable/c/ad46c907d7d9975a285c1e89a4adde652eaa93f5

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