rxrpc: only handle RESPONSE during service challenge

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

CVE-2026-31676 · Microsoft / collected KEV context

cve-program · CVE-2026-31676

• https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a
• https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd
• https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd
• https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585
• https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c
• https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8
• https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e
• https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c

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