Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.14 |
| Redhat | Enterprise Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1989165Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67Mailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing ListThird Party Advisory
- https://www.debian.org/security/2021/dsa-4978Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1989165Issue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67Mailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing ListThird Party Advisory
- https://www.debian.org/security/2021/dsa-4978Third Party Advisory
FAQ
What is CVE-2021-3679?
CVE-2021-3679 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 (w...
How severe is CVE-2021-3679?
CVE-2021-3679 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3679?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux, Debian Debian Linux.