netfilter: conntrack_irc: fix possible out-of-bounds read

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

CVE-2026-53268 · Microsoft / collected KEV context

cve-program · CVE-2026-53268

• https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8
• https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6
• https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f
• https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea
• https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e
• https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc
• https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176
• https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56

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