cve/2021/CVE-2021-4083.md

CVE-2021-4083

Description

A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system. This flaw affects Linux kernel versions prior to 5.16-rc4.

POC

Reference

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=054aa8d439b9
• https://www.oracle.com/security-alerts/cpujul2022.html

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/EGI-Federation/SVG-advisories
• https://github.com/advxrsary/vuln-scanner
• https://github.com/sam8k/Dynamic-and-Static-Analysis-of-SOUPs