CVE-2025-3512

EUVD-2025-10735
There 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
TQtCCNA
4.8 MEDIUM
LOCAL
LOW
NONE
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Clear
Base Score
CVSS 3.x
EPSS Score
Percentile: 11.88%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
qtqt
6.8.0 ≤
𝑥
< 6.8.4
CNA
Debian logo
Debian Releases
Debian Product
Codename
qt6-base
bookworm
6.4.2+dfsg-10
fixed
forky
6.10.2+dfsg-16
fixed
sid
6.10.2+dfsg-16
fixed
trixie
6.8.2+dfsg-9+deb13u2
fixed
qtbase-opensource-src
bookworm
5.15.8+dfsg-11+deb12u3
fixed
bullseye
5.15.2+dfsg-9+deb11u1
fixed
bullseye (security)
5.15.2+dfsg-9+deb11u2
fixed
forky
5.15.19+dfsg-4
fixed
sid
5.15.19+dfsg-4
fixed
trixie
5.15.15+dfsg-6+deb13u1
fixed
qtbase-opensource-src-gles
bookworm
5.15.8+dfsg-3
fixed
bullseye
5.15.2+dfsg-4
fixed
forky
5.15.19+dfsg-2
fixed
sid
5.15.19+dfsg-2
fixed
trixie
5.15.15+dfsg-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
qt6-base
focal
dne
jammy
needs-triage
noble
needs-triage
oracular
ignored
plucky
ignored
questing
ignored
resolute
needs-triage
qtbase-opensource-src-gles
focal
needs-triage
jammy
needs-triage
noble
needs-triage
oracular
ignored
plucky
ignored
questing
ignored
resolute
needs-triage
xenial
needs-triage
qtbase-opensource-src
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
oracular
ignored
plucky
not-affected
questing
not-affected
resolute
not-affected
xenial
not-affected
Common Weakness Enumeration
References
https://codereview.qt-project.org/c/qt/qtbase/+/635546
http://www.openwall.com/lists/oss-security/2025/04/24/4
http://www.openwall.com/lists/oss-security/2025/04/24/5
http://www.openwall.com/lists/oss-security/2025/04/24/6
http://www.openwall.com/lists/oss-security/2025/04/25/1
http://www.openwall.com/lists/oss-security/2025/04/25/2