Buffer overflow in Qt Qtbase

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 characters.

Vulnerability class: Buffer Overflow

EPSS: 0.021 (79.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2019-18281?
CVE-2019-18281 is a medium-severity vulnerability in Qt Qtbase, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.3/10. Published 2019-10-23.
How severe is CVE-2019-18281?
Medium severity. CVSS v3 base score is 4.3 out of 10.