CVE-2019-18281
MEDIUMQt qtbase < 5.12.5 DoS via Directional Character Processing
Title source: llmDescription
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.
References (7)
Core 7
Core References
Permissions Required x_refsource_misc
https://bugreports.qt.io/browse/QTBUG-77819
Patch, Vendor Advisory x_refsource_misc
https://codereview.qt-project.org/c/qt/qtbase/+/271889
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2019/dsa-4556
Mailing List, Third Party Advisory mailing-list
x_refsource_bugtraq
https://seclists.org/bugtraq/2019/Nov/4
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4275-1/
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202003-60
Scores
CVSS v3
4.3
EPSS
0.0205
EPSS Percentile
78.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Details
CWE
CWE-119
Status
published
Products (3)
debian/debian_linux
9.0
debian/debian_linux
10.0
qt/qtbase
5.11.0 - 5.11.3
Published
Oct 23, 2019
Tracked Since
Feb 18, 2026