The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a critical Linux kernel zero-day vulnerability to its Known Exploited Vulnerabilities (KEV) catalog, warning federal agencies and organizations worldwide to patch immediately or discontinue use of affected systems. Tracked as CVE-2026-31431 and dubbed “Copy Fail”, the flaw carries a CVSS score of 7.8 (High) and […] The post CISA Warns of Linux Kernel 0-Day Vulnerability Exploited in Attacks appeared first on Cyber Security News.