Description
There is a Heap-based Buffer Overflow vulnerability in QTextMarkdownImporter. This requires an incorrectly formatted markdown file to be passed to QTextMarkdownImporter to trigger the overflow.This issue affects Qt from 6.8.0 to 6.8.4. Versions up to 6.6.0 are known to be unaffected, and the fix is in 6.8.4 and later.
Problem types
CWE-122 Heap-based Buffer Overflow
Product status
Any version before 6.6.0
6.6.0 (python) before 6.8.0
6.8.0 (python) before 6.8.4
6.8.4 (python)
Credits
oss-fuzz
References
www.openwall.com/lists/oss-security/2025/04/24/4
www.openwall.com/lists/oss-security/2025/04/24/5
www.openwall.com/lists/oss-security/2025/04/24/6
www.openwall.com/lists/oss-security/2025/04/25/1
www.openwall.com/lists/oss-security/2025/04/25/2
codereview.qt-project.org/c/qt/qtbase/+/635546