How severe is CVE-2023-43114?

CVE-2023-43114 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-43114 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43114?

CVE-2023-43114 affects Qt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-43114?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-43114 published?

CVE-2023-43114 was published on 2023-09-18 and last updated on 2026-06-17.

CVE-2023-43114

CVE-2023-43114 is a medium-severity vulnerability in Qt with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Qt
Published: 2023-09-18
Last modified: 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.

Frequently asked questions

What is CVE-2023-43114?: 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.
How severe is CVE-2023-43114?: CVE-2023-43114 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-43114 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43114?: CVE-2023-43114 affects Qt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-43114?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-43114 published?: CVE-2023-43114 was published on 2023-09-18 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*

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