CVE-2021-3679
First published: Tue Jul 20 2021(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-348.rt7.130.el8 | 0:4.18.0-348.rt7.130.el8 |
| redhat/kernel | <0:4.18.0-348.el8 | 0:4.18.0-348.el8 |
| Linux Linux kernel | <5.14 | |
| Linux Linux kernel | =5.14 | |
| Linux Linux kernel | =5.14-rc1 | |
| Linux Linux kernel | =5.14-rc2 | |
| Redhat Enterprise Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| redhat/kernel | <5.14 | 5.14 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.106-3 6.1.112-1 6.11.5-1 6.11.6-1 |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-3679 https://nvd.nist.gov/vuln/detail/CVE-2021-3679 https://lore.kernel.org/lkml/20210723125527.767d1c18@oasis.local.home/
- https://bugzilla.redhat.com/show_bug.cgi?id=1989165
- https://access.redhat.com/errata/RHSA-2021:4140
- https://access.redhat.com/errata/RHSA-2021:4356
- https://access.redhat.com/security/cve/cve-2021-3679
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- https://www.debian.org/security/2021/dsa-4978
- https://launchpad.net/bugs/cve/CVE-2021-3679
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1989166
- https://lore.kernel.org/stable/20210723125633.655004181@goodmis.org/
- https://lore.kernel.org/stable/20210723125633.840379520@goodmis.org/#t
- https://lore.kernel.org/stable/20210723125634.584194330@goodmis.org/
- https://lore.kernel.org/lkml/20210723125527.767d1c18@oasis.local.home/
- https://git.kernel.org/linus/67f0d6d9883c13174669f88adac4f0ee656cc16a
- https://security-tracker.debian.org/tracker/CVE-2021-3679
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3679
- https://nvd.nist.gov/vuln/detail/CVE-2021-3679
- https://ubuntu.com/security/CVE-2021-3679
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