Reachable assertion in Qt - CVE-2025-5455
Published: July 1, 2025
Vulnerability identifier: #VU112077
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-5455
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Trolltech
Affected software:
Qt
Qt
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion within the qDecodeDataUrl() function in QtCore. A remote attacker can pass a specially crafted data, such as URL with a "charset" parameter but without a value, and crash the application.
How to mitigate CVE-2025-5455
Install updates from vendor's website.
Sources
- https://codereview.qt-project.org/c/qt/qtbase/+/642006
- https://www.qt.io/blog/security-advisory-recently-discovered-issue-in-qdecodedataurl-in-qtcore-impacts-qt
- https://codereview.qt-project.org/c/qt/qtbase/+/642434
- https://codereview.qt-project.org/c/qt/tqtc-qtbase/+/642469
- https://codereview.qt-project.org/c/qt/tqtc-qtbase/+/642734
- https://codereview.qt-project.org/c/qt/tqtc-qtbase/+/643952