CVE-2023-43787: Fedoraproject Fedora

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability was found in libX11 due to an integer overflow within the XCreateImage() function. This flaw allows a local user to trigger an integer overflow and execute arbitrary code with elevated privileges.

Affected products

• Fedoraproject Fedora: version 38 only
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only
• X.org LIBX11: before 1.8.7 (fixed in 1.8.7)

Published 2023-10-10. Last modified 2026-06-17.