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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.05% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 81.1% of scored records. A rank, not a probability.
- NVD base score
- 4.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2019-10-23 14:03Z7 YR AGO
- Last updated
- 2024-08-05 01:47Z2 YR AGO
- Reserved
- 2019-10-23
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
- Data version
- 5.1
- Document digest
- 96fb73218f2a12cbffff3a7ec8cc02b82a8fe8af289352c95d1ebd86fc9c0db3
05 Affected products
06 References
- bugreports.qt.iohttps://bugreports.qt.io/browse/QTBUG-77819
- codereview.qt-project.orghttps://codereview.qt-project.org/c/qt/qtbase/+/271889
- bugs.launchpad.nethttps://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784
- www.debian.orgDSA-4556https://www.debian.org/security/2019/dsa-4556
- seclists.org20191104 [SECURITY] [DSA 4556-1] qtbase-opensource-src security updatehttps://seclists.org/bugtraq/2019/Nov/4
- usn.ubuntu.comUSN-4275-1https://usn.ubuntu.com/4275-1/
- security.gentoo.orgGLSA-202003-60https://security.gentoo.org/glsa/202003-60
07 Fixed in
Debian 12
- qtbase-opensource-src Fixed in 5.12.5+dfsg-2
- qtbase-opensource-src-gles Fixed in 5.12.5+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- qtbase-opensource-src Fixed in 5.12.5+dfsg-2
- qtbase-opensource-src-gles Fixed in 5.12.5+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- qtbase-opensource-src Fixed in 5.12.5+dfsg-2
- qtbase-opensource-src-gles Fixed in 5.12.5+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.