vulnerability
CentOS Linux: CVE-2021-3640: Moderate: kernel-rt security and bug fix update (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:M/Au:N/C:C/I:C/A:C) | Mar 3, 2022 | Nov 9, 2022 | May 25, 2023 |
Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
Mar 3, 2022
Added
Nov 9, 2022
Modified
May 25, 2023
Description
A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.
Solutions
centos-upgrade-kernelcentos-upgrade-kernel-rt
References
Rapid7 Labs
2026 Global Threat Landscape Report
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