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Unity Linux 20.1050a Security Update: kernel (UTSA-2026-100316)

high Nessus Plugin ID 336145

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-2026-100316 advisory.

 In the Linux kernel, the following vulnerability has been resolved:

 octeontx2-af: Workaround SQM/PSE stalls by disabling sticky

 NIX SQ manager sticky mode is known to cause stalls when multiple SQs share an SMQ and transmit concurrently. Additionally, PSE may deadlock on transitions between sticky and non-sticky transmissions. There is also a credit drop issue observed when certain condition clocks are gated.

 work around these hardware errata by:
 - Disabling SQM sticky operation:
 - Clear TM6 (bit 15)
 - Clear TM11 (bit 14)
 - Disabling sticky non-sticky transition path that can deadlock PSE:
 - Clear TM5 (bit 23)
 - Preventing credit drops by keeping the control-flow clock enabled:
 - Set TM9 (bit 21)

 These changes are applied via NIX_AF_SQM_DBG_CTL_STATUS. With this configuration the SQM/PSE maintain forward progress under load without credit loss, at the cost of disabling sticky optimizations.

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

https://nvd.nist.gov/vuln/detail/CVE-2026-43296

http://www.nessus.org/u?13e990ad

http://www.nessus.org/u?99327cb8

Plugin Details

Severity: High

ID: 336145

File Name: unity_linux_UTSA-2026-100316.nasl

Version: 1.1

Type: Local

Published: 8/17/2026

Updated: 8/17/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-43296

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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: 8/13/2026

Vulnerability Publication Date: 3/12/2026

Reference Information

CVE: CVE-2026-43296