CVE-2019-18281
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…
Does this matter?
Lower severity and a low EPSS score (2.05%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- EPSS
- 2.05% probability · 81th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- qt/qtbase · debian/debian linux
- Source
- cve@mitre.org
EPSS 2.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugreports.qt.io/browse/QTBUG-77819Permissions Required
- https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784Issue Tracking, Third Party Advisory
- https://codereview.qt-project.org/c/qt/qtbase/+/271889Patch, Vendor Advisory
- https://seclists.org/bugtraq/2019/Nov/4Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-60
- https://usn.ubuntu.com/4275-1/
- https://www.debian.org/security/2019/dsa-4556Third Party Advisory
- https://bugreports.qt.io/browse/QTBUG-77819Permissions Required
- https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784Issue Tracking, Third Party Advisory
- https://codereview.qt-project.org/c/qt/qtbase/+/271889Patch, Vendor Advisory
- https://seclists.org/bugtraq/2019/Nov/4Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-60
- https://usn.ubuntu.com/4275-1/
- https://www.debian.org/security/2019/dsa-4556Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.