The Linux kernel vulnerability CVE-2026-31431 (CVSS 7.8 High) is a local privilege escalation flaw being actively exploited in the wild. It affects kernel versions 4.14 through 5.10.253, 5.11 through 5.15.203, 5.16 through 6.1.169, 6.2 through 6.6.136, and 6.7 through 6.12.84. Patches are available in kernel versions 5.10.254, 5.15.204, 6.1.170, 6.6.137, 6.12.85, 6.18.22, and 6.19.12, with major Linux distributions providing specific updates.
A vulnerability was identified in Linux Kernel. A local attacker can exploit this vulnerability to trigger elevation of privilege on the targeted system. Note: CVE-2026-31431 is being exploited in the wild. Copy Fail (CVE-2026-31431) is a... Impact Elevation of Privilege System / Technologies affected Ubuntu: https://ubuntu.com/security/CVE-2026-31431 Debian: https://security-tracker.debian.org/tracker/CVE-2026-31431 Red Hat: https://access.redhat.com/security/cve/cve-2026-31431 SUSE: https://www.suse.com/security/cve/CVE-2026-31431.html Amazon: https://explore.alas.aws.amazon.com/CVE-2026-31431.html Arch： https://security.archlinux.org/CVE-2026-31431 AlmaLinux: https://almalinux.org/blog/2026-05-01-cve-2026-31431-copy-fail/ Cloudlinux: https://blog.cloudlinux.com/cve-2026-31431-copy-fail-mitigation-and-patches Gentoo: https://bugs.gentoo.org/show_bug.cgi?id=CVE-2026-31431 Solutions Before installation of the software, please visit the software vendor web-site for more details. Apply fixes issued by the vendor: Ubuntu: https://ubuntu.com/security/CVE-2026-31431 Debian: https://security-tracker.debian.org/tracker/CVE-2026-31431 Red Hat: https://access.redhat.com/security/cve/cve-2026-31431 SUSE: https://www.suse.com/security/cve/CVE-2026-31431.html Amazon: https://explore.alas.aws.amazon.com/CVE-2026-31431.html Arch： https://security.archlinux.org/CVE-2026-31431 AlmaLinux: https://almalinux.org/blog/2026-05-01-cve-2026-31431-copy-fail/ Cloudlinux: https://blog.cloudlinux.com/cve-2026-31431-copy-fail-mitigation-and-patches Gentoo: https://bugs.gentoo.org/show_bug.cgi?id=CVE-2026-31431