CVE-2021-3679

Description

A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.

Categories

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.08% Top 25%
Vendor Advisory debian.org Vendor Advisory kernel.org
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1989165 issue tracking third party advisory patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a mailing list patch vendor advisory
https://www.debian.org/security/2021/dsa-4978 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-3679?
CVE-2021-3679 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3679?
To fix CVE-2021-3679, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3679 being actively exploited in the wild?
It is possible that CVE-2021-3679 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3679?
CVE-2021-3679 affects n/a kernel.
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