CVE-2021-20317

Description

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.

Category

4.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.01%
Vendor Advisory debian.org Vendor Advisory kernel.org
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1 patch vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2005258 issue tracking third party advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html third party advisory mailing list
https://www.debian.org/security/2022/dsa-5096 third party advisory vendor advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf

Frequently Asked Questions

What is the severity of CVE-2021-20317?
CVE-2021-20317 has been scored as a medium severity vulnerability.
How to fix CVE-2021-20317?
To fix CVE-2021-20317, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-20317 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-20317 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20317?
CVE-2021-20317 affects n/a kernel.
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