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cve/2021/CVE-2021-4203.md
0xMarcio cb00e1339f Update CVE list 2025-09-29 21:09
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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

Github