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Ubuntu Qt Declarative Severe Denial of Service Resource Exhaustion Issue

ubuntu
Calendar Grey June 1, 2026
Dist Ubuntu Esm H88
Qt Declarative in Ubuntu could lead to excessive resource use from malicious input. Update recommended.
Qt Declarative could be made to use excessive resources if it received specially crafted input.

Summary

Qt Declarative could be made to use excessive resources if it received

specially crafted input.

Software Description:

- qtdeclarative-opensource-src: Qt 5 declarative modules

Details:

It was discovered that Qt Declarative did not properly validate the

width and height attributes of image tags in the Text component of Qt

Quick. An attacker could possibly use this issue to cause Qt Declarative

to use excessive resources, leading to a denial of service.

Topics%20covered

Topics Covered

security advisory DoS Ubuntu important resource exhaustion QtDeclarative

Update Instructions

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

Ubuntu 24.04 LTS
  libqt5quick5                    5.15.13+dfsg-1ubuntu0.1+esm1
                                  Available with Ubuntu Pro

Ubuntu 22.04 LTS
  libqt5quick5                    5.15.3+dfsg-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  libqt5quick5                    5.12.8-0ubuntu1+esm1
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-8357-1

CVE-2025-12385

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8357-1

Topics%20covered

Topics Covered

security advisory DoS Ubuntu important resource exhaustion QtDeclarative

Package Information

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