Qt up to 6.5.10/6.8.5/6.10.0 Text allocation of resources

Summaryinfo

A vulnerability classified as problematic has been found in Qt up to 6.5.10/6.8.5/6.10.0. This affects an unknown part of the component Text. The manipulation leads to allocation of resources. This vulnerability is listed as CVE-2025-12385. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Qt up to 6.5.10/6.8.5/6.10.0 and classified as problematic. This issue affects some unknown processing of the component Text. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at codereview.qt-project.org. The identification of this vulnerability is CVE-2025-12385 since 10/28/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 277564 (Linux Distros Unpatched Vulnerability : CVE-2025-12385), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (277564) and EUVD (EUVD-2025-201103). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Qt

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5
• 6.5.0
• 6.5.1
• 6.5.2
• 6.5.3
• 6.5.4
• 6.5.5
• 6.5.6
• 6.5.7
• 6.5.8
• 6.5.9
• 6.5.10
• 6.6
• 6.7
• 6.8
• 6.8.0
• 6.8.1
• 6.8.2
• 6.8.3
• 6.8.4
• 6.8.5
• 6.9
• 6.10.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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