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Amazon Linux 2 : qt5-qtbase (ALAS-2026-3951)

high Nessus Plugin ID 351039

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of qt5-qtbase installed on the remote host is prior to 5.15.3-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3951 advisory.

 Uncontrolled recursion in Qt's QDomDocument serialization (QtXml) lets deeply nested untrusted XML crash the app via stack exhaustion (DoS only). (CVE-2026-11573)

 QDomDocument XML parsing is vulnerable to a remotely-triggerable denial-of-service crash when processing untrusted input. (CVE-2026-19248)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'yum update qt5-qtbase' or or 'yum update --advisory ALAS2-2026-3951' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2-2026-3951.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2026-11573.html

https://explore.alas.aws.amazon.com/CVE-2026-19248.html

Plugin Details

Severity: High

ID: 351039

File Name: al2_ALAS-2026-3951.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/29/2026

Updated: 9/29/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.62

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-19248

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

CVSS v4

Risk Factor: High

Base Score: 7.1

Threat Score: 4.9

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:qt5-qtbase-common, p-cpe:/a:amazon:linux:qt5-qtbase-debuginfo, p-cpe:/a:amazon:linux:qt5-qtbase-devel, p-cpe:/a:amazon:linux:qt5-qtbase-examples, p-cpe:/a:amazon:linux:qt5-qtbase-gui, p-cpe:/a:amazon:linux:qt5-qtbase-mysql, p-cpe:/a:amazon:linux:qt5-qtbase-odbc, p-cpe:/a:amazon:linux:qt5-qtbase-postgresql, p-cpe:/a:amazon:linux:qt5-qtbase-private-devel, p-cpe:/a:amazon:linux:qt5-qtbase-static, p-cpe:/a:amazon:linux:qt5-qtbase

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 9/8/2026

Reference Information

CVE: CVE-2026-11573, CVE-2026-19248