Race Condition Affecting perf package, versions <0:4.18.0-348.7.1.el8_5
Threat Intelligence
EPSS
0.04% (6th
percentile)
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-RHEL8-PERF-4182678
- 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 RHEL:8 perf to version 0:4.18.0-348.7.1.el8_5 or higher.
This issue was patched in RHSA-2021:5227.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL: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-2021:5227
- 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
version 3.1