cve/2021/CVE-2021-4203.md

CVE-2021-4203

Description

A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race with listen() (and connect()) in the Linux kernel. In this flaw, an attacker with a user privileges may crash the system or leak internal kernel information.

POC

Reference

• https://www.oracle.com/security-alerts/cpujul2022.html

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/sam8k/Dynamic-and-Static-Analysis-of-SOUPs