New DirtyClone Linux Kernel Flaw Lets Local Users Gain Root via Cloned Packets

**DirtyClone (CVE-2026-43503)** is a high-severity Linux kernel local privilege escalation in the DirtyFrag family that allows a local attacker to corrupt file-backed memory via cloned network packets and gain root; a public exploit walkthrough was published by JFrog. The report details the root cause (loss of the shared-frag flag during skb fragment transfers), affected distributions and configurations (notably systems with unprivileged user namespaces enabled), available patches and mitigations, and warns that similar code paths remain risky.