VULNERABILITY INTELLIGENCE

CVE-2021-4203

CVSS score6.8 MEDIUM
EPSS probability1.75%
CISA KEVNot currently listed
Published2022-03-25
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-362
  • nvd@nist.gov: CWE-362

Primary references