For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
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.
Security Fix(es):
* xorg-x11-server: SProcRenderCompositeGlyphs out-of-bounds access
(CVE-2021-4008)
* xorg-x11-server: SProcXFixesCreatePointerBarrier out-of-bounds access
(CVE-2021-4009)
* xorg-x11-server: SProcScreenSaverSuspend out-of-bounds access
(CVE-2021-4010)
* xorg-x11-server: SwapCreateRegister out-of-bounds access (CVE-2021-4011)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
https://access.redhat.com/security/cve/CVE-2021-4008 https://access.redhat.com/security/cve/CVE-2021-4009 https://access.redhat.com/security/cve/CVE-2021-4010 https://access.redhat.com/security/cve/CVE-2021-4011 https://access.redhat.com/security/updates/classification#important
Red Hat Enterprise Linux Client (v. 7):
Source:
xorg-x11-server-1.20.4-17.el7_9.src.rpm
x86_64:
xorg-x11-server-Xephyr-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-Xorg-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-common-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-debuginfo-1.20.4-17.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch:
xorg-x11-server-source-1.20.4-17.el7_9.noarch.rpm
x86_64:
xorg-x11-server-Xdmx-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-Xnest-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-Xvfb-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-Xwayland-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-debuginfo-1.20.4-17.el7_9.i686.rpm
xorg-x11-server-debuginfo-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-devel-1.20.4-17.el7_9.i686.rpm
xorg-x11-server-devel-1.20.4-17.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
Source:
xorg-x11-server-1.20.4-17.el7_9.src.rpm
noarch:
xorg-x11-server-source-1.20.4-17.el7_9.noarch.rpm
x86_64:
xorg-x11-server-Xdmx-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-Xephyr-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-Xnest-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-Xorg-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-Xvfb-1.20.4-17.el7_9.x86_64.rpm
xorg-x11-server-Xwayland-1.20.4-17.el7_9.x86_64.rpm
Read the Full Advisory
An update for xorg-x11-server is now available for Red Hat Enterprise Linux7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64
2026059 - CVE-2021-4008 xorg-x11-server: SProcRenderCompositeGlyphs out-of-bounds access
2026072 - CVE-2021-4009 xorg-x11-server: SProcXFixesCreatePointerBarrier out-of-bounds access
2026073 - CVE-2021-4010 xorg-x11-server: SProcScreenSaverSuspend out-of-bounds access
2026074 - CVE-2021-4011 xorg-x11-server: SwapCreateRegister out-of-bounds access
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