Detections
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Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003871)
medium Nessus Plugin ID 288602
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-2026-003871 advisory.In PolicyKit (aka polkit) 0.115, the start time protection mechanism can be bypassed because fork() is not atomic, and therefore authorization decisions are improperly cached. This is related to lack of uid checking in polkitbackend/polkitbackendinteractiveauthority.c.
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?8bf3c828
http://www.nessus.org/u?e73b603c
http://www.securityfocus.com/bid/106537
https://access.redhat.com/errata/RHSA-2019:0230
https://access.redhat.com/errata/RHSA-2019:0420
https://access.redhat.com/errata/RHSA-2019:0832
https://access.redhat.com/errata/RHSA-2019:2699
https://access.redhat.com/errata/RHSA-2019:2978
https://bugs.chromium.org/p/project-zero/issues/detail?id=1692
https://git.kernel.org/linus/7b55851367136b1efd84d98fea81ba57a98304cf
http://www.nessus.org/u?7cd4be0b
https://gitlab.freedesktop.org/polkit/polkit/merge_requests/19
https://lists.debian.org/debian-lts-announce/2019/01/msg00021.html
https://lists.debian.org/debian-lts-announce/2019/05/msg00041.html
https://lists.debian.org/debian-lts-announce/2019/05/msg00042.html
https://security-tracker.debian.org/tracker/CVE-2019-6133
https://support.f5.com/csp/article/K22715344
https://usn.ubuntu.com/3901-1/
https://usn.ubuntu.com/3901-2/
https://usn.ubuntu.com/3903-1/
https://usn.ubuntu.com/3903-2/
https://usn.ubuntu.com/3908-1/
https://usn.ubuntu.com/3908-2/
https://usn.ubuntu.com/3910-1/
https://usn.ubuntu.com/3910-2/
Plugin Details
Severity: Medium
ID: 288602
File Name: unity_linux_UTSA-2026-003871.nasl
Version: 1.2
Type: local
Published: 1/16/2026
Updated: 1/17/2026
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-2019-6133
CVSS v3
Risk Factor: Medium
Base Score: 6.7
Temporal Score: 5.8
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:R/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/UOS-Server/release, Host/UOS-Server/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 1/16/2026
Vulnerability Publication Date: 1/11/2019
Reference Information
CVE: CVE-2019-6133