CVE-2021-3669: Medium severity Linux Linux kernel vulnerability
A flaw was found in the Linux kernel. Measuring usage of the shared memory does not scale with large shared memory segment counts which could lead to resource exhaustion and DoS.
Other sources
A flaw was found in the Linux kernel. Reading /proc/sysvipc/shm does not scale with large shared memory segment counts which could lead to resource exhaustion and DoS.
— Red Hat
Affected Software
Remediation
Information
Event History
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
What is the severity of CVE-2021-3669?
CVE-2021-3669 has a moderate severity rating as it can lead to resource exhaustion and denial of service in the Linux kernel.
How do I fix CVE-2021-3669?
To fix CVE-2021-3669, update the Linux kernel to versions 0:4.18.0-372.9.1.rt7.166.el8 or 0:4.18.0-372.9.1.el8 or later.
Which operating systems are affected by CVE-2021-3669?
CVE-2021-3669 affects various Linux distributions including Red Hat Enterprise Linux, Debian, and Fedora.
What type of vulnerability is CVE-2021-3669?
CVE-2021-3669 is a denial-of-service (DoS) vulnerability that occurs due to resource exhaustion when handling large shared memory segment counts.
Is my Linux system vulnerable to CVE-2021-3669?
You can determine if your Linux system is vulnerable to CVE-2021-3669 by checking if you are running an affected version of the kernel or relevant software.