Detections
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Unity Linux 20.1070e Security Update: kernel (UTSA-2026-000491)
medium Nessus Plugin ID 282087
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-2026-000491 advisory.There is a use-after-free in kernel versions before 5.5 due to a race condition between the release of ptp_clock and cdev while resource deallocation. When a (high privileged) process allocates a ptp device file (like /dev/ptpX) and voluntarily goes to sleep. During this time if the underlying device is removed, it can cause an exploitable condition as the process wakes up to terminate and clean all attached files.
The system crashes due to the cdev structure being invalid (as already freed) which is pointed to by the inode.
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
Plugin Details
Severity: Medium
ID: 282087
File Name: unity_linux_UTSA-2026-000491.nasl
Version: 1.1
Type: local
Published: 1/7/2026
Updated: 1/7/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Medium
Base Score: 4.4
Temporal Score: 3.3
Vector: CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2020-10690
CVSS v3
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 5.6
Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 1/7/2026
Vulnerability Publication Date: 4/28/2020
Reference Information
CVE: CVE-2020-10690