CVE-2021-4203

MEDIUM

Linux Kernel - Use After Free

Title source: llm
STIX 2.1

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.

Scores

CVSS v3 6.8
EPSS 0.0009
EPSS Percentile 25.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

Details

CWE
CWE-362 CWE-416
Status published
Products (17)
linux/linux_kernel 5.15 (4 CPE variants)
linux/linux_kernel < 5.15
netapp/a700s_firmware
netapp/active_iq_unified_manager
netapp/bootstrap_os
netapp/e-series_santricity_os_controller 11.0.0 - 11.70.2
netapp/element_software
netapp/h300s_firmware
netapp/h410c_firmware
netapp/h410s_firmware
... and 7 more
Published Mar 25, 2022
Tracked Since Feb 18, 2026