What is CVE-2023-32763?

CVE-2023-32763 is a high-severity vulnerability in Qt, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-05-28.

How severe is CVE-2023-32763?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Qt

CVE-2023-32763

An issue was discovered in Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1. When a SVG file with an image inside it is rendered, a QTextLayout buffer overflow can be triggered.

Vulnerability class: Buffer Overflow

Published 2023-05-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

codereview.qt-project.org/c/qt/qtbase/+/476125 (Patch)
lists.qt-project.org/pipermail/announce/2023-May/000413.html (Patch, Mailing List)
lists.debian.org/debian-lts-announce/2023/08/msg00028.html (mailing-list)
security.gentoo.org/glsa/202402-03 (vendor-advisory)
lists.debian.org/debian-lts-announce/2024/04/msg00027.html (mailing-list)

Frequently asked questions

What is CVE-2023-32763?: CVE-2023-32763 is a high-severity vulnerability in Qt, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-05-28.
How severe is CVE-2023-32763?: High severity. CVSS v3 base score is 7.5 out of 10.