CVE-2021-3679
5.5 MEDIUMA 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 trac...
Published: 2021-08-05 · Last updated: 2026-06-17
Severity and scoring
- CVSS
- 5.5 MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CWE
- CWE-400, CWE-835
Affected products
| Vendor | Product |
|---|---|
| debian | debian_linux, enterprise_linux, linux_kernel |
| linux | debian_linux, enterprise_linux, linux_kernel |
| redhat | debian_linux, enterprise_linux, linux_kernel |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-3679
- [Patch]https://bugzilla.redhat.com/show_bug.cgi?id=1989165
- [Patch]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a
- [Other]https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- [Other]https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- [Other]https://www.debian.org/security/2021/dsa-4978
- [Patch]https://bugzilla.redhat.com/show_bug.cgi?id=1989165
- [Patch]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a
- [Other]https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- [Other]https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- [Other]https://www.debian.org/security/2021/dsa-4978
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