CVE-2023-43114: Qt

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in Qt before 5.15.16, 6.x before 6.2.10, and 6.3.x through 6.5.x before 6.5.3 on Windows. When using the GDI font engine, if a corrupted font is loaded via QFontDatabase::addApplicationFont{FromData], then it can cause the application to crash because of missing length checks.

Affected products

• Qt Qt: before 5.15.16 (fixed in 5.15.16); from 6.0.0, before 6.2.10 (fixed in 6.2.10); from 6.5.0, before 6.5.3 (fixed in 6.5.3)

Published 2023-09-18. Last modified 2026-06-17.