DigiNews

Summary

The article covers CVE-2026-31431 Copy Fail, a Linux kernel local privilege escalation via AF_ALG and AEAD ESN byte rearrangement that writes into the page cache. It explains the attack chain, how a 4-byte write can corrupt a readable file's in-memory image, the PoC, container implications, and the patch that reverts the in-place optimization, plus mitigations.