Detections
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Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003888)
medium Nessus Plugin ID 288517
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-2026-003888 advisory.A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.
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?d9108665
http://www.openwall.com/lists/oss-security/2020/11/25/1
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7
http://www.nessus.org/u?db48cbe2
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
https://seclists.org/oss-sec/2020/q4/104
Plugin Details
Severity: Medium
ID: 288517
File Name: unity_linux_UTSA-2026-003888.nasl
Version: 1.2
Type: local
Published: 1/16/2026
Updated: 1/17/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.5
CVSS v2
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 4.8
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:C
CVSS Score Source: CVE-2020-28974
CVSS v3
Risk Factor: Medium
Base Score: 5
Temporal Score: 4.5
Vector: CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:L/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: 11/20/2020
Reference Information
CVE: CVE-2020-28974