CVE-2025-3512

NameCVE-2025-3512
DescriptionThere is a Heap-based Buffer Overflow vulnerability in QTextMarkdownImporter. This requires an incorrectly formatted markdown file to be passed to QTextMarkdownImporter to trigger the overflow.This issue affects Qt from 6.8.0 to 6.8.4. Versions up to 6.6.0 are known to be unaffected, and the fix is in 6.8.4 and later.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1103022

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qt6-base (PTS)bookworm6.4.2+dfsg-10fixed
trixie, sid6.8.2+dfsg-6fixed
qtbase-opensource-src (PTS)bullseye5.15.2+dfsg-9+deb11u1fixed
bookworm5.15.8+dfsg-11+deb12u2fixed
trixie, sid5.15.15+dfsg-5fixed
qtbase-opensource-src-gles (PTS)bullseye5.15.2+dfsg-4fixed
bookworm5.15.8+dfsg-3fixed
trixie, sid5.15.15+dfsg-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qt6-basesourcebookworm(not affected)
qt6-basesource(unstable)6.8.2+dfsg-61103022
qtbase-opensource-srcsource(unstable)(not affected)
qtbase-opensource-src-glessource(unstable)(not affected)

Notes

[bookworm] - qt6-base <not-affected> (Vulnerable code introduce after 6.6.0)
- qtbase-opensource-src <not-affected> (Vulnerable code introduce after 6.6.0)
- qtbase-opensource-src-gles <not-affected> (Vulnerable code introduce after 6.6.0)
https://codereview.qt-project.org/c/qt/qtbase/+/635546

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