SB2025070137 - Reachable assertion in Trolltech Qt
Published: July 1, 2025
Security Bulletin ID
SB2025070137
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Reachable assertion (CVE-ID: CVE-2025-5455)
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.
Remediation
Install update from vendor's website.
References
- 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