Resource Exhaustion Affecting kernel-debug package, versions <0:4.18.0-348.el8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUG-1539338
- published 11 Aug 2021
- disclosed 20 Jul 2021
Introduced: 20 Jul 2021
CVE-2021-3679 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug to version 0:4.18.0-348.el8 or higher.
This issue was patched in RHSA-2021:4356.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2021-3679
- https://www.debian.org/security/2021/dsa-4978
- https://bugzilla.redhat.com/show_bug.cgi?id=1989165
- 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://access.redhat.com/errata/RHSA-2021:4356
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html