Fragnesia Made Public As Latest Linux Local Privilege Escalation Vulnerability

A new Linux local privilege escalation flaw called Fragnesia has been disclosed as a Dirty Frag-like vulnerability, allowing arbitrary byte writes into the kernel page cache of read-only files through a separate ESP/XFRM logic bug. Phoronix reports: Proof of concept code for Fragnesia is already out there. There is a two-line patch for addressing the issue within the Linux kernel’s skbuff.c code.