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CVE-2021-20317

nvd nist
Published: Sep 27, 2021Modified: Jun 17, 2026

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4.4
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Exploitability: 0.8 / Impact: 3.6
Source: NVD

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.

Affected (4)

Linux
1 product
Linux Kernel
Debian
1 product
Debian Linux
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Linux
Linux Kernel
Before 5.4
Linux Kernel
Version 5.4
Configuration B
2 vulnerable
Vulnerable SoftwareAffected Versions
Debian
Debian Linux
Version 10.0
Debian Linux
Version 9.0

Related CWEs

CWE-665
Improper Initialization
The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.

References (12)

Source: secalert@redhat.com
Issue TrackingThird Party Advisory
Source: secalert@redhat.com
Source: secalert@redhat.com
PatchVendor Advisory
Source: secalert@redhat.com
Mailing ListThird Party Advisory
Source: secalert@redhat.com
Mailing ListThird Party Advisory
Source: secalert@redhat.com
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
PatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

Timeline

No history available yet.