// #ubuntu

Linux 'Dirty Frag' Zero-Day Chains Two Kernel Flaws for Deterministic Root — PoC Published, No Patch

Security researchers have published a proof-of-concept exploit for a new Linux kernel local privilege escalation vulnerability chain nicknamed Dirty Frag, which combines flaws in the xfrm-ESP and RxRPC page-cache subsystems to reliably achieve root access from an unprivileged user process. Unlike its predecessor CopyFail, Dirty Frag is deterministic — it does not rely on race conditions and succeeds reliably across Ubuntu, RHEL, CentOS Stream, AlmaLinux, openSUSE, and Fedora. No CVE ID or kernel patch has been issued at time of disclosure.