CVE-2021-20317
Public on 2021-09-27
Modified on 2021-11-04
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. The highest threat from this vulnerability is system availability.
Severity
CVSS v3 Base Score
See breakdown
Affected Packages
Platform | Package | Release Date | Advisory | Status |
---|---|---|---|---|
Amazon Linux 2 - Core | kernel | 2021-10-28 | ALAS2-2021-1719 | Fixed |
Amazon Linux 2 - Microvm-kernel-4.14 Extra | microvm-kernel | 2023-09-14 | ALAS2MICROVM-KERNEL-4.14-2023-001 | Fixed |
CVSS Scores
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 4.4 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
NVD | CVSSv2 | 4.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C |
NVD | CVSSv3 | 4.4 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |