Improper Initialization Affecting perf package, versions <0:4.18.0-305.28.1.el8_4
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Test your applications- Snyk ID SNYK-RHEL8-PERF-4138691
- published 26 Sep 2021
- disclosed 23 Sep 2021
Introduced: 23 Sep 2021
CVE-2021-20317 Open this link in a new tabHow to fix?
Upgrade RHEL:8 perf to version 0:4.18.0-305.28.1.el8_4 or higher.
This issue was patched in RHSA-2021:4650.
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 flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.
References
- https://access.redhat.com/security/cve/CVE-2021-20317
- https://bugzilla.redhat.com/show_bug.cgi?id=2005258
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://www.debian.org/security/2022/dsa-5096