CVE-2021-20317

medium

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.

References

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1

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

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

https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf

Details

Source: MITRE

Published: 2021-09-27

Updated: 2022-06-14

Type: CWE-665

Risk Information

CVSS v2

Base Score: 4.9

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 4.4

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

Impact Score: 3.6

Exploitability Score: 0.8

Severity: MEDIUM