Multiple vulnerabilities were identified in RedHat Linux Kernel. A remote attacker could exploit some of these vulnerabilities to trigger denial of service condition, elevation of privilege and sensitive information disclosure on the targeted system.
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CVE-2026-31431 is being exploited in the wild. Copy Fail (CVE-2026-31431) is a logic bug in the Linux kernel's authencesn cryptographic template. It lets an unprivileged local user trigger a deterministic, controlled 4-byte write into the page cache of any readable file on the system. A single 732-byte Python script can edit a setuid binary and obtain root on essentially all Linux distributions shipped since 2017.