CVE-2023-37369

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-08-20 · updated 2026-06-17

Description

In Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.2, there can be an application crash in QXmlStreamReader via a crafted XML string that triggers a situation in which a prefix is greater than a length.

Affected products

Debian Linux: 10.0
Qt: before 5.15.15; from 6.0.0 before 6.2.9; from 6.3.0 before 6.5.2 — fixed in 5.15.15, 6.2.9, 6.5.2

How to fix

Upgrade to a fixed version: Qt 5.15.15, 6.2.9, 6.5.2. Check the vendor advisory for mitigations.

References

https://bugreports.qt.io/browse/QTBUG-114829
https://codereview.qt-project.org/c/qt/qtbase/+/455027
https://lists.debian.org/debian-lts-announce/2023/08/msg00028.html
https://lists.debian.org/debian-lts-announce/2024/04/msg00027.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3JR3N3IF5MUSETGYE46OZFOGGPY3VZT/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SZK7EDD4ILPPSQAYO54FANUC4NFYLTHU/
https://bugreports.qt.io/browse/QTBUG-114829
https://codereview.qt-project.org/c/qt/qtbase/+/455027
https://lists.debian.org/debian-lts-announce/2023/08/msg00028.html
https://lists.debian.org/debian-lts-announce/2024/04/msg00027.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O3JR3N3IF5MUSETGYE46OZFOGGPY3VZT/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SZK7EDD4ILPPSQAYO54FANUC4NFYLTHU/

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