CVE-2007-4730: Buffer overflow in the compNewPixmap function in compalloc.c in the Composite extension for the X.org X11 s...

Security readout for executives and security teams

CVE-2007-4730 is an old local code-execution flaw in the X.org X11 server. A user already on the machine could trigger a buffer overflow in the Composite extension and potentially run code with the X server's privileges. Internet-facing exposure is not indicated by the sources. Exposure is most likely on legacy Unix/Linux workstations, shared desktops, terminal servers, or old appliances running X.org X11 server before 1.4 or unpatched vendor builds. Systems without local untrusted users have lower practical risk. Prioritize remediation where old graphical Linux or Unix systems still allow multiple local users. For modern fleets, this is mainly a legacy exposure cleanup item unless unsupported systems remain in production. Mitigation focus: Apply vendor X.org/X11 server security updates or backported fixes.; Upgrade affected X.org X11 server builds to 1.4 or a vendor-fixed package.; Prioritize shared systems where untrusted users can start graphical sessions..

Prepared

Jun 29, 2026, 03:38 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.