#VU107430 Resource exhaustion in Qt - CVE-2025-30348

Vulnerability identifier: #VU107430

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-30348

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Qt
Universal components / Libraries / Scripting languages

Vendor: Trolltech

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper control of internal resources consumption in QDomNode::save() when parsing XML data. A remote attacker trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Qt: 5.15 - 5.15.18, 6.0 - 6.0.4, 6.1.0 - 6.1.3, 6.2.0 - 6.2.13, 6.3.0 - 6.3.2, 6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.5.0 - 6.5.8, 6.6.0 - 6.6.3, 6.7.0 - 6.7.2

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External links
https://codereview.qt-project.org/c/qt/qtbase/+/581442
https://bugreports.qt.io/browse/QTBUG-127549

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.