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 Windo

Routine

MEDIUM 5.5UPGRADE

CVE-2023-43114 is a medium-severity flaw (CVSS 5.5) affecting qt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Published	2023-09-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: qt

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-09-18 07:15 UTCPublished CVE record published
2026-06-17 06:25 UTCUpdated Record last modified

qt qt UPGRADE

Affected: < 5.15.16 · >= 6.0.0 and < 6.2.10 · >= 6.5.0 and < 6.5.3

Fixed in: 5.15.16, 6.2.10, 6.5.3

Safe to downgrade to: a release before 6.0.0

1. Check installed version

apt-cache policy qt || rpm -q qt || qt --version

2. UPGRADE to 5.15.16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade qt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade qt

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.0.0 (Debian / Ubuntu)

apt-cache madison qt sudo apt install qt=<VERSION_BEFORE_6.0.0> sudo apt-mark hold qt

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list qt sudo dnf downgrade qt-<VERSION_BEFORE_6.0.0> sudo dnf versionlock add qt

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-43114?

qt: upgrade to 5.15.16, 6.2.10, 6.5.3. Exact commands for each OS are on this page.

Is CVE-2023-43114 being exploited?

CVE-2023-43114 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-43114 affect?

CVE-2023-43114 affects qt. Severity is medium (CVSS 5.5). 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 cau

How urgent is CVE-2023-43114?

Priority 24/100. No elevated risk signals yet.

Software pages

Windows vulnerabilities

Related CVEs

CVE-2023-51714 CRITICAL 9.8 MITIGATE UPGRADE An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5
CVE-2020-0570 HIGH 7.3 UPGRADE MITIGATE Uncontrolled search path in the QT Library before 5.14.0, 5.12.7 and 5.9.10 may allow an authenticated user to
CVE-2025-5683 MEDIUM 5.5 UPGRADE When loading a specifically crafted ICNS format image file in QImage then it will trigger a crash. This issu
CVE-2024-39936 HIGH 8.6 UPGRADE An issue was discovered in HTTP2 in Qt before 5.15.18, 6.x before 6.2.13, 6.3.x through 6.5.x before 6.5.7, an
CVE-2024-36048 CRITICAL 9.8 UPGRADE MITIGATE QAbstractOAuth in Qt Network Authorization in Qt before 5.15.17, 6.x before 6.2.13, 6.3.x through 6.5.x before

References

← Back to latest CVEs