Unity Linux 20.1050a Security Update: kernel (UTSA-2026-146688)

high Nessus Plugin ID 373150

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-2026-146688 advisory.

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

staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()

rtw_restruct_wmm_ie() scans in_ie for a WMM IE with:

while (i < in_len) { ...
if (i + 5 < in_len && in_ie[i] == 0xDD && ...) { ...
break;
} i += (in_ie[i + 1] + 2); /* to the next IE element */ }

When the i + 5 < in_len match check fails simply because i is within 5 bytes of the end of the buffer (i.e. no WMM IE was found near the tail of in_ie), execution falls through to i += (in_ie[i + 1] + 2), which reads in_ie[i + 1]. If i == in_len
- 1 at that point, this is a 1-byte out-of-bounds read of an attacker-influenced IE buffer built from association/scan data.

Commit a75281626fc8f (staging: rtl8723bs: fix potential out-of-bounds read in rtw_restruct_wmm_ie) added the i + 5 < in_len guard to the match condition itself, but did not add an equivalent guard before the fallthrough advance, so the same class of OOB read remained reachable through the non-matching path.

Add an explicit bounds check before advancing to the next IE.

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.

Plugin Details

Severity: High

ID: 373150

File Name: unity_linux_UTSA-2026-146688.nasl

Version: 1.1

Type: Local

Family: Unity Linux Local Security Checks

Published: 10/28/2026

Updated: 10/28/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.45

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-90016

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/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/UOS-Server/release, Host/UOS-Server/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 10/28/2026

Vulnerability Publication Date: 9/16/2026

Reference Information

CVE: CVE-2026-90016

Detections

Analytics