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The LockServer function in os/utils.c in X.Org xserver before 1.11.2 allows local users to change the permissions of arbitrary files to 444, read those files, and possibly cause a denial of service (removed execution permission) via a symlink attack on a temporary lock file.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Centos_linux | — | Upgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-develUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-Xorg | Dec 1, 2016 | Jul 3, 2012 |
| Debian | — | Upgrade xorg-server | Jul 30, 2024 | Jul 3, 2012 |
| Freebsd | — | Upgrade xorg-server | Dec 10, 2025 | Oct 18, 2011 |
| Gentoo Linux | — | Upgrade x11-base/xorg-server. | Oct 30, 2017 | Jul 3, 2012 |
| Oracle Solaris | — | Upgrade x11/server/xorg to version 1.10.3-0.175.0.6.0.3.1223 on Solaris 11.0 | May 29, 2017 | Jul 3, 2012 |
| Oracle_linux | — | Upgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-develUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-Xnest | Oct 16, 2024 | Jul 3, 2012 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Oct 18, 2011 |
| Suse | — | Upgrade xorg-x11-server-rdpUpgrade xorg-x11-XvncUpgrade xorg-x11-server-sdkUpgrade xorg-x11-serverUpgrade xorg-x11-server-dmxUpgrade xorg-x11-server-extra | Feb 17, 2015 | Jul 9, 2013 |
| Ubuntu | — | Upgrade xserver-xorg-core | Nov 8, 2024 | Jul 3, 2012 |
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