Security researchers identified speculative execution side-channel methods which have the potential to improperly gather sensitive data from multiple types of computing devices with different vendors&rsquo;
processors and operating systems.

This update requires an update to the intel-microcode package, which is non-free. It is related to DLA-1446-1 and adds more mitigations for additional types of Intel processors.

For more information please also read the official Intel security advisories at :

https://www.intel.com/content/www/us/en/security-center/advisory/intel
-s a-00088.html https://www.intel.com/content/www/us/en/security-center/advisory/intel
-s a-00115.html https://www.intel.com/content/www/us/en/security-center/advisory/intel
-s a-00161.html

For Debian 8 'Jessie', these problems have been fixed in version 3.20180807a.1~deb8u1.

We recommend that you upgrade your intel-microcode packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of F5 Networks BIG-IP installed on the remote host is prior to 14.1.2.2 / 15.0.0. It is, therefore, affected by a vulnerability as referenced in the K95275140 advisory.

  - Systems with microprocessors utilizing speculative execution and address translations may allow     unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access     via a terminal page fault and a side-channel analysis. (CVE-2018-3620)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

L1 Terminal Fault speculative side channel patch bundle [XSA-273, CVE-2018-3620, CVE-2018-3646] drop patches also in the bundle, which also includes Use of v2 grant tables may cause crash on ARM [XSA-268] (#1616081) x86: Incorrect MSR_DEBUGCTL handling lets guests enable BTS [XSA-269] (#1616077) oxenstored does not apply quota-maxentity [XSA-272] (#1616080)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An update of the linux package has been released.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003559 advisory.

    Systems with microprocessors utilizing speculative execution and address translations may allow     unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access     via a terminal page fault and a side-channel analysis.

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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001385 advisory.

    Systems with microprocessors utilizing speculative execution and address translations may allow     unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access     via a terminal page fault and a side-channel analysis.

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.

ID	Name	Product	Family	Published	Updated	Severity
117502	Debian DLA-1506-1 : intel-microcode security update (Foreshadow) (Spectre)	Nessus	Debian Local Security Checks	9/17/2018	1/9/2026	medium
125485	F5 Networks BIG-IP : OS Kernel and SMM mode L1 Terminal Fault vulnerability (K95275140)	Nessus	F5 Networks Local Security Checks	5/29/2019	2/28/2025	medium
120490	Fedora 28 : xen (2018-683dfde81a) (Foreshadow)	Nessus	Fedora Local Security Checks	1/3/2019	3/21/2025	medium
121883	Photon OS 1.0: Linux PHSA-2018-1.0-0180	Nessus	PhotonOS Local Security Checks	2/7/2019	3/20/2025	medium
286361	Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-003559)	Nessus	Unity Linux Local Security Checks	1/15/2026	1/16/2026	medium
291170	Unity Linux 20.1070e Security Update: kernel (UTSA-2026-001385)	Nessus	Unity Linux Local Security Checks	1/16/2026	1/16/2026	medium

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