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…

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.

Scores

EPSS (exploitation in 30 days)

2.1% · top 19% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

• n/a
• CWE-119 (opens in a new tab)All about CWE-119 and its CVEs

Affected products

• n/a

  • affected n/a

References (7)

• https://bugreports.qt.io/browse/QTBUG-77819 (opens in a new tab)x_refsource_MISCx_transferred
• https://codereview.qt-project.org/c/qt/qtbase/+/271889 (opens in a new tab)x_refsource_MISCx_transferred
• https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784 (opens in a new tab)x_refsource_MISCx_transferred
• DSA-4556 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• 20191104 [SECURITY] [DSA 4556-1] qtbase-opensource-src security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• USN-4275-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• GLSA-202003-60 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-18281](https://trackcve.app/badge/CVE-2019-18281.svg)](https://trackcve.app/cve/CVE-2019-18281)

Record last updated 5 Aug 2024, 01:47 UTC.