What is CVE-2018-20784?

CVE-2018-20784 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, classified as a Infinite Loop flaw (CWE-835). CVE-2018-20784 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2018-20784?

CVE-2018-20784 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2018-20784?

No patch is currently available for CVE-2018-20784. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2018-20784 actively exploited?

CVE-2018-20784 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Infinite Loop (CWE-835)?

The product contains an iteration that does not exit even when it should. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/835.html

CVE-2018-20784

Critical

In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.

Package Linux Kernel

Published 2019-02-22

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-835

CVE-2018-20784 is a Infinite Loop vulnerability

What is Infinite Loop?

The product contains an iteration that does not exit even when it should. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2018-20784 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://access.redhat.com/errata/RHSA-2019:1959

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2019:1971

Third Party Advisory
Kernel.org
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2

Release Notes Vendor Advisory
Ubuntu Security
https://usn.ubuntu.com/4115-1/

Third Party Advisory
Ubuntu Security
https://usn.ubuntu.com/4118-1/

Third Party Advisory
Ubuntu Security
https://usn.ubuntu.com/4211-1/

Third Party Advisory
Ubuntu Security
https://usn.ubuntu.com/4211-2/

Third Party Advisory
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0
Patch

Details

CVE ID CVE-2018-20784

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2019-02-22

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2018-20784?

CVE-2018-20784 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 , classified as an Infinite Loop flaw (CWE-835) . CVE-2018-20784 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2018-20784?

CVE-2018-20784 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2018-20784?

No patch is currently available for CVE-2018-20784. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2018-20784 actively exploited?

No — CVE-2018-20784 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Infinite Loop (CWE-835)?

The product contains an iteration that does not exit even when it should. View CWE-835 on MITRE CWE →