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Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-002979)

medium Nessus Plugin ID 287443

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-2026-002979 advisory.

 In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL.

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?0ad25d52

http://www.nessus.org/u?c861115c

https://bugs.chromium.org/p/project-zero/issues/detail?id=1589

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.17.2

http://www.nessus.org/u?25f60902

https://security-tracker.debian.org/tracker/CVE-2018-12904

https://usn.ubuntu.com/3752-1/

https://usn.ubuntu.com/3752-2/

https://usn.ubuntu.com/3752-3/

https://www.exploit-db.com/exploits/44944/

Plugin Details

Severity: Medium

ID: 287443

File Name: unity_linux_UTSA-2026-002979.nasl

Version: 1.2

Type: local

Published: 1/15/2026

Updated: 1/16/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-12904

CVSS v3

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 4.4

Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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: 1/15/2026

Vulnerability Publication Date: 6/22/2018

Reference Information

CVE: CVE-2018-12904