Dirty Frag gets a sequel as Fragnesia hands Linux attackers root-level access

A Linux kernel local privilege escalation flaw called Fragnesia has been discovered, allowing unprivileged users to gain root access by corrupting page cache memory. The bug is tracked as CVE-2026-46300 and has public proof-of-concept exploit code available. Linux vendors have started pushing out advisories and mitigation guidance to patch the vulnerability.