CVE-2018-20784

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

22/02/2019

Last modified:

17/06/2026

Description

In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq&#39;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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

9.80

Severity 3.x

CRITICAL

Vector 2.0

AV:N/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

7.50

Severity 2.0

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	4.13 (including)	4.14.93 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.19 (including)	4.19.15 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	4.20.2 (excluding)
cpe:2.3:o:linux:linux_kernel:5.0:rc1::::::
cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::
cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
cpe:2.3:o:redhat:enterprise_linux_for_real_time:8:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2018-20784

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools