net/smc: reject CHID-0 ACCEPT that matches an empty ism_dev slot

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

CVE-2026-64048 · Microsoft / collected KEV context

cve-program · CVE-2026-64048

• https://git.kernel.org/stable/c/903f7688ffeb9b323d70652c01f554bd4ba2a3d6
• https://git.kernel.org/stable/c/dd2f9dd83c68abd7ba7ded7075290b016cb7ecd0
• https://git.kernel.org/stable/c/6927cacf2b10d4fa80c1a2d407512ef9397c59c6
• https://git.kernel.org/stable/c/d38ba387244e5c5f7db3e11ea98bc2c7beccb0c0
• https://git.kernel.org/stable/c/53eb7bd09aace72fa17510d80e0caf5ca058c231
• https://git.kernel.org/stable/c/afa9036b8c9963947b487c36e332df6a42c96fcb
• https://git.kernel.org/stable/c/65edb3b0822cfe5041be8fbabebd57e2e5ad9f4e
• https://git.kernel.org/stable/c/277740023def559a4a2ddc3e8e784ee37a0f16a9

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