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.

SeverityMedium

CVSS4.4

Exploit probability—

Product

Linux Kernel

PublishedSep 27, 2021

First seenSep 27, 2021

Weakness typeCWE-665CWE-665

How to fix

Update

linux linux_kernel5.4 or later

Vendor advisories

debian.org/security/2022/dsa-5096

Affected products

Product	Affected versions	Fixed in
linux linux_kernel	v < 5.4, 5.4	5.4
debian debian_linux	9.0, 10.0	—

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