netfilter: require Ethernet MAC header before using eth_hdr()

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

CVE-2026-53131 · Microsoft / collected KEV context

cve-program · CVE-2026-53131

• https://git.kernel.org/stable/c/4435888e1bf139d2bfe5911643d4217382136743
• https://git.kernel.org/stable/c/063f43361e884acd7300790e90194430275d0d0c
• https://git.kernel.org/stable/c/726abf97566867f808fec9d8a408eb9698bd570a
• https://git.kernel.org/stable/c/367abcacc13a8e2e7624408b7f593bd1e60e49d9
• https://git.kernel.org/stable/c/5d634afb8b83b49de562792fd0d047416a43bd4d
• https://git.kernel.org/stable/c/cea435ea7e868ea6fdf039bc4f2090c1d829b556
• https://git.kernel.org/stable/c/62443dc21114c0bbc476fa62973db89743f2f137

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