Security | Threat Detection | Cyberattacks | DevSecOps | Compliance

On April 29, 2026, details about the ‘Copy Fail’ vulnerability (CVE-2026-31431) were publicly disclosed. This high-severity (CVSS score of 7.8) privilege escalation vulnerability impacts Linux distributions shipped since 2017. It allows an unprivileged local user to obtain root-level access on affected Linux systems by corrupting the kernel’s in-memory page cache of a privileged binary.

AI finds the vulnerabilities, but exploiting them is a different problem. How Sophos Endpoint defends in the AI era, and what the public record on Mythos shows. When Mozilla shipped Firefox 150 with fixes for 271 issues identified by Anthropic’s Mythos model, the headlines focused on the count. The detail that mattered was further down: Mozilla credited only three CVEs to the model. The remaining 268 were classified as defense-in-depth, hardening, or bugs in code paths that could not be exploited.

AI just became the world's most dangerous exploit writer. Here's why Sophos Endpoint is built to stop it. AI-generated zero-days are here. Sophos Endpoint was architected to stop exploits that have never been seen before — blocking the techniques every attack must use, at the moment of execution, with no signature, no cloud lookup, and no configuration required.