CVE-2006-4447: X.org Emu-Linux-x87-Xlibs

High severity, CVSS 7.2. EPSS: 0.4% chance of exploitation in the next 30 days.

X.Org and XFree86, including libX11, xdm, xf86dga, xinit, xload, xtrans, and xterm, does not check the return values for setuid and seteuid calls when attempting to drop privileges, which might allow local users to gain privileges by causing those calls to fail, such as by exceeding a ulimit.

Affected products

• X.org Emu-Linux-x87-Xlibs: version 7.0_r1 only
• X.org x11r6: version 6.7.0 only; version 6.8 only; version 6.8.1 only; version 6.8.2 only
• X.org x11r7: version 1.0 only; version 1.0.1 only; version 1.0.2 only
• X.org Xdm: version 1.0.3 only
• X.org XF86DGA: version 1.0.0 only
• X.org Xinit: version 1.0.2_r5 only
• X.org Xload: version 1.0.0 only
• X.org Xorg-Server: version 1.02_r5 only
• X.org Xterm: version 214 only

Published 2006-08-30. Last modified 2026-06-16.