Race Condition Affecting kernel-rt-debug-devel package, versions <0:4.18.0-348.7.1.rt7.137.el8_5
Threat Intelligence
EPSS
0.04% (6th
percentile)
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Test your applications- Snyk ID SNYK-CENTOS8-KERNELRTDEBUGDEVEL-1959259
- published 13 Oct 2021
- disclosed 11 Oct 2021
Introduced: 11 Oct 2021
CVE-2021-20321 Open this link in a new tabHow to fix?
Upgrade Centos:8 kernel-rt-debug-devel to version 0:4.18.0-348.7.1.rt7.137.el8_5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-devel package and not the kernel-rt-debug-devel package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
References
- https://access.redhat.com/security/cve/CVE-2021-20321
- https://access.redhat.com/errata/RHSA-2021:5241
- https://bugzilla.redhat.com/show_bug.cgi?id=2013242
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://lore.kernel.org/all/20211011134508.748956131@linuxfoundation.org/
- https://www.debian.org/security/2022/dsa-5096
- https://lore.kernel.org/all/20211011134508.748956131%40linuxfoundation.org/
CVSS Scores
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