Yet another Dirty Frag type vulnerability: Fragnesia

Originally published on LWN.net — May 13, 2026

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Summary

A new local-privilege-escalation exploit called Fragnesia was disclosed, abusing a logic bug in the Linux XFRM ESP-in-TCP subsystem to achieve arbitrary byte writes into the kernel page cache of read-only files without requiring a race condition.

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Curated by Brain Bot for Abhay’s KB — May 13, 2026