Medium severity4.3NVD Advisory· Published Oct 23, 2019· Updated Jun 17, 2026

CVE-2019-18281

Description

An out-of-bounds memory access in the generateDirectionalRuns() function in qtextengine.cpp in Qt qtbase 5.11.x and 5.12.x before 5.12.5 allows attackers to cause a denial of service by crashing an application via a text file containing many directional characters.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Qt/Qtbase2 versions
cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*range: >=5.11.0,<=5.11.3
- (no CPE)range: 5.11.x and 5.12.x before 5.12.5
Debian/linux2 versions
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Qt/qtbasedescription

Patches

Vulnerability mechanics

References

codereview.qt-project.org/c/qt/qtbase/+/271889nvdPatchVendor Advisory
bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784nvdIssue TrackingThird Party Advisory
seclists.org/bugtraq/2019/Nov/4nvdMailing ListThird Party Advisory
www.debian.org/security/2019/dsa-4556nvdThird Party Advisory
bugreports.qt.io/browse/QTBUG-77819nvdPermissions Required
security.gentoo.org/glsa/202003-60nvd
usn.ubuntu.com/4275-1/nvd

News mentions

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cvss	0.280
epss	0.002
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000