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DevOps & SRE notes It's time to update your kernel An unprivileged local user can write 4 controlled bytes into the page cache of any readable file on a Linux system, and use that to gain root. https://copy.fail/
the Dirty Frag vulnerability class, first discovered and reported by Hyunwoo Kim (@v4bel), which can obtain root privileges on major Linux distributions by chaining the xfrm-ESP Page-Cache Write vulnerability and the RxRPC Page-Cache Write vulnerability.

https://github.com/V4bel/dirtyfrag
X (formerly Twitter) V4bel (@v4bel) on X Independent Vuln. Researcher / Pwn2Own Berlin 2025, 2026 / Google kernelCTF 0-day / Google kvmCTF 0-day / Pwnie Awards 2025, 2026
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