What’s Vulnerable › Vulnerabilities

CVE-2023-43114

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-18 · updated 2026-06-17

Description

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: before 5.15.16; from 6.0.0 before 6.2.10; from 6.5.0 before 6.5.3 — fixed in 5.15.16, 6.2.10, 6.5.3

How to fix

Upgrade to a fixed version: Qt 5.15.16, 6.2.10, 6.5.3. Check the vendor advisory for mitigations.

References

• https://codereview.qt-project.org/c/qt/qtbase/+/503026
• https://codereview.qt-project.org/c/qt/qtbase/+/503026

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