30d signal volume
A high-severity Linux vulnerability, 'Copy Fail' (CVE-2026-31431), enables root privilege escalation across cloud environments and Kubernetes workloads. With a working exploit already in the wild, organizations should act quickly to detect, mitigate, and reduce risk. Source: Microsoft Security Blog.
CISA added CVE-2026-31431, a Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability, to its Known Exploited Vulnerabilities Catalog based on active exploitation evidence. Federal agencies must remediate this vulnerability per Binding Operational Directive 22-01, and CISA urges all organizations to prioritize remediation as part of vulnerability management practices.