What is CVE-2023-32573?

CVE-2023-32573 is a medium-severity vulnerability in Qt, classified under Divide By Zero. CVSS score: 6.5/10. Published 2023-05-10.

How severe is CVE-2023-32573?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Qt

CVE-2023-32573

In Qt before 5.15.14, 6.0.x through 6.2.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1, QtSvg QSvgFont m_unitsPerEm initialization is mishandled.

Published 2023-05-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Qt
Red Hat Enterprise Linux — versions 8.0, 9.0

Weakness classification (CWE)

CWE-369 — Divide By Zero

References

codereview.qt-project.org/c/qt/qtsvg/+/474093 (Patch)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.debian.org/debian-lts-announce/2023/08/msg00028.html (mailing-list)

Frequently asked questions

What is CVE-2023-32573?: CVE-2023-32573 is a medium-severity vulnerability in Qt, classified under Divide By Zero. CVSS score: 6.5/10. Published 2023-05-10.
How severe is CVE-2023-32573?: Medium severity. CVSS v3 base score is 6.5 out of 10.