Black & White Path

May 9, 2026 · Information Security

Dirty Frag: A New Deterministic Linux Page‑Cache Write Vulnerability for Stable Root Escalation

Dirty Frag is a newly disclosed Linux kernel page‑cache write bug that combines xfrm‑ESP and RxRPC primitives to deterministically corrupt struct sk_buff‑frag, allowing an unprivileged local user to gain root without race conditions, works across major distributions, and can be mitigated by disabling the affected modules.