Act
active
CISA KEV: Linux Kernel Flaw Chained with PHP2Shell in Active Attacks
- Engineer — Act: CISA KEV listing confirms active exploitation; patch Linux kernel to the remediated version immediately on any internet-facing or multi-tenant Linux hosts, prioritizing those running PHP-based web applications where the PHP2Shell initial-access vector applies.
- SOC/IR — Act: Active chained exploitation means assume-breach posture on Linux web servers; hunt for PHP web shell artifacts (unusual PHP child process spawning, outbound connections from web server processes) followed by local privilege escalation behavior since the CISA advisory date.
- Leader — Plan: CISA KEV listing signals active exploitation but this is a patch-and-detect operational issue; confirm engineering teams have the Linux kernel patch queued as priority-one this sprint and verify SOC has added detection coverage for the attack chain.
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