40efa6359c
The function compCheckRedirect() may fail if it cannot allocate the
backing pixmap.
In that case, compRedirectWindow() will return a BadAlloc error.
However that failure code path will shortcut the validation of the
window tree marked just before, which leaves the validate data partly
initialized.
That causes a use of uninitialized pointer later.
The fix is to not shortcut the call to compHandleMarkedWindows() even in
the case of compCheckRedirect() returning an error.
CVE-2025-26599, ZDI-CAN-25851
This vulnerability was discovered by:
Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
(cherry picked from commit
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|---|---|---|
| .gitlab-ci | ||
| composite | ||
| damageext | ||
| dbe | ||
| dix | ||
| doc | ||
| dri3 | ||
| fb | ||
| glamor | ||
| glx | ||
| hw | ||
| include | ||
| man | ||
| mi | ||
| miext | ||
| os | ||
| present | ||
| randr | ||
| record | ||
| render | ||
| test | ||
| Xext | ||
| xfixes | ||
| Xi | ||
| xkb | ||
| .appveyor.yml | ||
| .dir-locals.el | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .mailmap | ||
| COPYING | ||
| meson.build | ||
| meson_options.txt | ||
| README.md | ||
| xserver.ent.in | ||
X Server
The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.freedesktop.org/mailman/listinfo/xorg
The primary development code repository can be found at:
https://gitlab.freedesktop.org/xorg/xserver
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches
As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc: