RHSA-2015:0797 — Security Advisory
Red Hat Security Advisory: xorg-x11-server security update
Severity
ModerateRed Hat Product Security
Products
Official CSAF product identity
Published · April 10, 2015
Updated · June 25, 2026
Topic
Updated xorg-x11-server packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7.
Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
Description
X.Org is an open source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.
A buffer over-read flaw was found in the way the X.Org server handled XkbGetGeometry requests. A malicious, authorized client could use this flaw to disclose portions of the X.Org server memory, or cause the X.Org server to crash using a specially crafted XkbGetGeometry request. (CVE-2015-0255)
This issue was discovered by Olivier Fourdan of Red Hat.
All xorg-x11-server users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.