A critical security vulnerability, CVE-2026-52923, has been disclosed for the Linux kernel, allowing local attackers to potentially escalate privileges to root. The flaw has a CVSS score of 7.8 and affects multiple Linux distributions, including Red Hat Enterprise Linux. Researchers confirmed the existence of a proof-of-concept exploit, raising concerns despite no confirmed exploitation in the wild.
The vulnerability resides in the SysV IPC subsystem, where improper ID allocation can lead to privilege escalation through a use-after-free attack. Administrators are urged to apply the latest kernel patches and reboot affected systems to mitigate risks.