Some Linux distributions such as Arch Linux and RedHat Fedora have already released patches or mitigations for the Copy Fail exploit. Nearly every Linux distribution released since 2017 has a vulnerability known as Copy Fail, allowing users to gain admin privileges. Publicly known as CVE-2026-31431, it utilizes a Python script working across all affected distributions without needing version checks or recompilation. According to Ars Technica, Copy Fail’s threat is that it can bypass monitoring tools as page-cache corruption doesn’t mark the page dirty or flush modified bytes to disk. The security firm Theori identified Copy Fail with help from Xint Code AI. On April 1st, a patch was added to the Linux kernel, but details were published before all distributions could update. While Arch Linux, RedHat Fedora, and Amazon Linux have released patches, others have not yet addressed the issue.
AI Scanning Uncovers Critical Linux Copy Fail Security Flaw
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