CVE-2021-3679

MediumCVSS 5.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400 CWE-835

Affected software

Vendor	Product	Versions
n/a	kernel	kernel 5.14-rc3

References

https://bugzilla.redhat.com/show_bug.cgi?id=1989165Issue Tracking, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16aMailing List, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2021/dsa-4978Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1989165Issue Tracking, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16aMailing List, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2021/dsa-4978Third Party Advisory

Timeline

Published: Aug 5, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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