CVE Catalog

CVE-2023-5574

HighCVSS 7.0
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.54%

41th percentile - higher than 41% of all known CVEs

Summary

A use-after-free flaw was found in xorg-x11-server-Xvfb, occurring in a very specific and legacy configuration (multi-screen setup with multiple protocol screens, known as Zaphod mode). The issue may be triggered when the pointer is warped from screen 1 to screen 0, potentially allowing for privilege escalation or denial of service.

Risk Assessment

This vulnerability may lead to privilege escalation or denial of service, posing a significant threat to the stability and security of the system.

Recommendation

It is recommended to avoid using the legacy Zaphod configuration in Xvfb and to update to the latest version to minimize risk.

Related vulnerabilities

Original NVD description (English source)

A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped from a screen 1 to a screen 0, a use-after-free issue may be triggered during shutdown or reset of the Xvfb server, allowing for possible escalation of privileges or denial of service.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS