vulnerability
CentOS Linux: CVE-2021-4203: Important: kernel-rt security and bug fix update (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:M/Au:S/C:P/I:N/A:P) | Mar 25, 2022 | May 13, 2022 | May 25, 2023 |
Severity
5
CVSS
(AV:N/AC:M/Au:S/C:P/I:N/A:P)
Published
Mar 25, 2022
Added
May 13, 2022
Modified
May 25, 2023
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.
Solutions
centos-upgrade-kernelcentos-upgrade-kernel-rt
References
Rapid7 Labs
2026 Global Threat Landscape Report
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