Rewterz Threat Advisory – Linux Kernel Privilege Escalation

Severity

High

Analysis Summary

Linux Kernel could allow a local authenticated attacker to gain elevated privileges on the system, caused by an use-after-free flaw in the handling of file descriptors in io_uring. By sending a specially-crafted request, an authenticated attacker could exploit this vulnerability to gain elevated privileges and execute arbitrary code in the context of the kernel.

Impact

Privilege escalation

Affected Vendors

Linux

Affected Products

Linux Kernel 5.10

Remediation

Upgrade to the latest version of Linux Kernel (5.10.2 or later)