xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()

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

CVE-2026-64580 · Microsoft / collected KEV context

cve-program · CVE-2026-64580

• https://git.kernel.org/stable/c/97e032e5733e49471fb73de117ea2ac1ac7c479a
• https://git.kernel.org/stable/c/df6856c2dda9187601d29b5fbd7a81b3b178cedf
• https://git.kernel.org/stable/c/43de8a49335e611adb271bbd52e84dfbc11fc185
• https://git.kernel.org/stable/c/ff636d7b7cba6dea82ecf580415ea57f2c1a11b6
• https://git.kernel.org/stable/c/e078da1b4e11390cff3201c19a9a1fe70c5b934f
• https://git.kernel.org/stable/c/136992de9bb91871084ae52d172610541c76e4d2

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