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[USN-7780-1] Qt vulnerabilities

Posted on 29 September 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7780-1
September 28, 2025

qtbase-opensource-src vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Qt.

Software Description:
- qtbase-opensource-src: Qt 5 libraries

Details:

It was discovered that Qt did not correctly handle certain inputs when
using the SQL ODBC driver plugin. An attacker could possibly use this issue
to cause a denial of service. (CVE-2023-24607)

It was discovered that Qt did not correctly parse certain strict-transport-
security headers. An attacker could possibly use this issue to leak
sensitive information. This issue only affected Ubuntu 20.04 LTS and Ubuntu
22.04 LTS. (CVE-2023-32762)

It was discovered that Qt did not correctly handle certain inputs from DNS
servers. A remote attacker could possibly use this issue to execute
arbitrary code or cause a denial of service. (CVE-2023-33285)

It was discovered that Qt did not correctly validate certain CA
certificates for TLS. An attacker could possibly use this issue to gain
access to unauthorized resources. (CVE-2023-34410)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
libqt5core5a 5.15.3+dfsg-2ubuntu0.2+esm1
Available with Ubuntu Pro
libqt5gui5 5.15.3+dfsg-2ubuntu0.2+esm1
Available with Ubuntu Pro

Ubuntu 20.04 LTS
libqt5core5a 5.12.8+dfsg-0ubuntu2.1+esm1
Available with Ubuntu Pro
libqt5gui5 5.12.8+dfsg-0ubuntu2.1+esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
libqt5core5a 5.9.5+dfsg-0ubuntu2.6+esm1
Available with Ubuntu Pro
libqt5gui5 5.9.5+dfsg-0ubuntu2.6+esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libqt5core5a 5.5.1+dfsg-16ubuntu7.7+esm1
Available with Ubuntu Pro
libqt5gui5 5.5.1+dfsg-16ubuntu7.7+esm1
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7780-1
CVE-2023-24607, CVE-2023-32762, CVE-2023-33285, CVE-2023-34410

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