Embargo Broken: Public PoC Released for “Dirty Frag” Linux Kernel Exploit Granting Instant Root Access

Dirty Frag is a newly disclosed Linux kernel vulnerability that enables unprivileged users to achieve immediate root by exploiting a zero-copy send path where in-place cryptographic operations can modify page-cache pages the attacker should only read; a public proof-of-concept and full technical walkthrough have been released, the exploit chains xfrm-ESP and RxRPC page-cache write primitives to work across major distributions (including Ubuntu), and it reportedly bypasses prior mitigations such as algif_aead blacklisting.