Linux Kernel CVE-2026-46333: 9-Year-Old Privilege Escalation Flaw Exposed

Cybersecurity researchers have uncovered CVE-2026-46333, a Linux kernel flaw that has gone unnoticed for nine years.

The vulnerability carries a CVSS score of 5.5 and stems from improper privilege management, allowing an unprivileged local user to read sensitive files and run arbitrary commands with root privileges on default installations of several major distributions.

The flaw does not require network access; it can be triggered locally by any user with shell access. The kernel patch was released in early 2026, but many systems still run older versions that remain vulnerable. WordPress sites hosted on servers running affected kernels are at risk if an attacker gains local access. Administrators should verify the kernel version and apply the latest security update immediately.