What is CVE-2021-20317?

CVE-2021-20317 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10. CVE-2021-20317 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-20317?

CVE-2021-20317 has a CVSS score of 4.4 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-20317?

No patch is currently available for CVE-2021-20317. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-20317 actively exploited?

CVE-2021-20317 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-20317

Medium

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.

Package Linux Kernel

Published 2021-09-27

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

4.4

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-665

CVE-2021-20317 is classified as CWE-665

See CWE-665 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-20317 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2005258

Issue Tracking Third Party Advisory
Cert-Portal
https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
Debian Security
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html

Mailing List Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html

Mailing List Third Party Advisory
Debian Security
https://www.debian.org/security/2022/dsa-5096

Third Party Advisory
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1
Patch

Details

CVE ID CVE-2021-20317

Severity Medium

CVSS score 4.4 / 10

CVSS version 3.1

Published 2021-09-27

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-20317?

CVE-2021-20317 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10 . CVE-2021-20317 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-20317?

CVE-2021-20317 has a CVSS score of 4.4 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-20317?

No patch is currently available for CVE-2021-20317. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-20317 actively exploited?

No — CVE-2021-20317 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.