pedit COW (CVE-2026-46331): Mitigation and Kernel Update on CloudLinux

On June 17, 2026, researcher Massimiliano Oldani published a working proof-of-concept named packet_edit_meme for a Linux kernel local privilege escalation now tracked as CVE-2026-46331 and nicknamed pedit COW. The flaw is in the kernel's traffic-control (tc) subsystem. Any unprivileged local user on an affected host can use it to gain root in a single command.