Detections
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Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-004341)
medium Nessus Plugin ID 288686
Synopsis
The Unity Linux host is missing one or more security updates.Description
The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004341 advisory.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.)
Tenable has extracted the preceding description block directly from the Unity Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected kernel package.See Also
http://www.nessus.org/u?f805e514
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.9
http://www.nessus.org/u?12c1cf94
https://github.com/kubernetes/kubernetes/issues/67577
http://www.nessus.org/u?949af2d0
https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html
https://relistan.com/the-kernel-may-be-slowing-down-your-app
https://security-tracker.debian.org/tracker/CVE-2019-19922
https://security.netapp.com/advisory/ntap-20200204-0002/
Plugin Details
Severity: Medium
ID: 288686
File Name: unity_linux_UTSA-2026-004341.nasl
Version: 1.2
Type: local
Published: 1/16/2026
Updated: 1/16/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Low
Base Score: 2.1
Temporal Score: 1.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2019-19922
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
Required KB Items: Host/local_checks_enabled, Host/UOS-Server/release, Host/UOS-Server/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 1/16/2026
Vulnerability Publication Date: 11/19/2019
Reference Information
CVE: CVE-2019-19922