Fragnesia Makes Three: Why It Couldn't Touch Workloads Under a Tailored AppArmor Profile Either
Fragnesia (CVE-2026-46300) is the third universal Linux kernel LPE in the Dirty Frag class to land in under two weeks. It abuses the XFRM ESP-in-TCP path to write into the page cache of read-only files with no race condition, and ships with a one-line public exploit. For workloads running under a behaviour-generated AppArmor profile, the surface it needs was never in the allow list. This is the same non-event, a third time. Here's why, and how to confirm your exposure in seconds.
By Hannes Ullman
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