CVE-2025-12385

Description

Allocation of Resources Without Limits or Throttling, Improper Validation of Specified Quantity in Input vulnerability in The Qt Company Qt on Windows, MacOS, Linux, iOS, Android, x86, ARM, 64 bit, 32 bit allows Excessive Allocation. This issue affects users of the Text component in Qt Quick. Missing validation of the width and height in the <img> tag could cause an application to become unresponsive. This issue affects Qt: from 5.0.0 through 6.5.10, from 6.6.0 through 6.8.5, from 6.9.0 through 6.10.0.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qt6-declarative	26.04 LTS resolute	Vulnerable
	25.10 questing	Vulnerable
	25.04 plucky	Ignored end of life, was needs-triage
	24.04 LTS noble	Vulnerable
	22.04 LTS jammy	Vulnerable
qtdeclarative-opensource-src	26.04 LTS resolute	Not affected
	25.10 questing	Vulnerable
	25.04 plucky	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 5.15.13+dfsg-1ubuntu0.1+esm1
	22.04 LTS jammy	Fixed 5.15.3+dfsg-1ubuntu0.1~esm1
	20.04 LTS focal	Fixed 5.12.8-0ubuntu1+esm1
	18.04 LTS bionic	Ignored changes too intrusive
	16.04 LTS xenial	Ignored end of ESM support, was needed
qtdeclarative-opensource-src-gles	26.04 LTS resolute	Vulnerable
	25.10 questing	Vulnerable
	25.04 plucky	Ignored end of life, was needs-triage
	24.04 LTS noble	Vulnerable
	22.04 LTS jammy	Vulnerable
	20.04 LTS focal	Vulnerable
	16.04 LTS xenial	Ignored end of ESM support, was needed

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Notes

hlibk

On bionic and below, methods required to apply the fix do not exist. Fixing this CVE would require a custom patch which increases the risk of regressions.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
qt6-declarative	Upstream: https://codereview.qt-project.org/c/qt/qtdeclarative/+/687239 Upstream: https://codereview.qt-project.org/c/qt/qtdeclarative/+/687766
qtdeclarative-opensource-src	Upstream: https://codereview.qt-project.org/c/qt/qtdeclarative/+/687239 Upstream: https://codereview.qt-project.org/c/qt/qtdeclarative/+/687766
qtdeclarative-opensource-src-gles	Upstream: https://codereview.qt-project.org/c/qt/qtdeclarative/+/687239 Upstream: https://codereview.qt-project.org/c/qt/qtdeclarative/+/687766

References

Related Ubuntu Security Notices (USN)

USN-8357-1
Qt Declarative vulnerability
1 June 2026