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Linux Kernel CVE-2021-20317

MEDIUM
Improper Initialization (CWE-665)
2021-09-27 secalert@redhat.com
4.4
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
4.4 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

1
CVE Published
Sep 27, 2021 - 11:15 nvd
MEDIUM 4.4

DescriptionNVD

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.

AnalysisAI

A flaw was found in the Linux kernel. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity.

Technical ContextAI

This vulnerability is classified under CWE-665. 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 products include: Linux Linux Kernel, Debian Debian Linux.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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CVE-2021-20317 vulnerability details – vuln.today

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