<p>Upgrade <code>RHEL:8</code> <code>perf</code> to version 0:4.18.0-193.el8 or higher.<br>This issue was patched in <code>RHSA-2020:1769</code>.</p>

Resource Exhaustion Affecting perf package, versions <0:4.18.0-193.el8

Threat Intelligence

0.16% (53^rd percentile)

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Snyk ID SNYK-RHEL8-PERF-3744957
published 26 Jul 2021
disclosed 22 Dec 2019

Report a new vulnerability Found a mistake?

Introduced: 22 Dec 2019

CVE-2019-19922 Open this link in a new tab CWE-400 Open this link in a new tab

How to fix?

Upgrade RHEL:8 perf to version 0:4.18.0-193.el8 or higher.
This issue was patched in RHSA-2020:1769.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

kernel/sched/fair.c in the Linux kernel before 5.3.9, when cpu.cfs_quota_us is used (e.g., with Kubernetes), allows attackers to cause a denial of service against non-cpu-bound applications by generating a workload that triggers unwanted slice expiration, aka CID-de53fd7aedb1. (In other words, although this slice expiration would typically be seen with benign workloads, it is possible that an attacker could calculate how many stray requests are required to force an entire Kubernetes cluster into a low-performance state caused by slice expiration, and ensure that a DDoS attack sent that number of stray requests. An attack does not affect the stability of the kernel; it only causes mismanagement of application execution.)

References

CVSS Scores

version 3.1

Attack Vector (AV)

Local
Attack Complexity (AC)

Low
Privileges Required (PR)

Low
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

None
Integrity (I)

None
Availability (A)

High