Rapid7 Vulnerability & Exploit Database

Red Hat: CVE-2021-4203: CVE-2021-4203 kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses (Multiple Advisories)

Free InsightVM Trial No Credit Card Necessary
Watch Demo See how it all works
Back to Search

Red Hat: CVE-2021-4203: CVE-2021-4203 kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses (Multiple Advisories)

Severity
5
CVSS
(AV:N/AC:M/Au:S/C:P/I:N/A:P)
Published
03/25/2022
Created
05/14/2022
Added
05/13/2022
Modified
03/13/2024

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.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2021-4203
  • RHSA-2022:1975
  • RHSA-2022:1988
  • RHSA-2022:5626
  • RHSA-2022:5633

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;