xserver-xorg: fix CVE-2025-62229 CVE-2025-62230 CVE-2025-62231

xserver-xorg: fix CVE-2025-62229 CVE-2025-62230 CVE-2025-62231

>From https://lists.x.org/archives/xorg-announce/2025-October/003635.html:

1) CVE-2025-62229: Use-after-free in XPresentNotify structures creation

    Using the X11 Present extension, when processing and adding the
    notifications after presenting a pixmap, if an error occurs, a dangling
    pointer may be left in the error code path of the function causing a
    use-after-free when eventually destroying the notification structures
    later.

    Introduced in: Xorg 1.15
    Fixed in: xorg-server-21.1.19 and xwayland-24.1.9
    Fix: https://gitlab.freedesktop.org/xorg/xserver/-/commit/5a4286b1
    Found by: Jan-Niklas Sohn working with Trend Micro Zero Day Initiative.

2) CVE-2025-62230: Use-after-free in Xkb client resource removal

    When removing the Xkb resources for a client, the function
    XkbRemoveResourceClient() will free the XkbInterest data associated
    with the device, but not the resource associated with it.

    As a result, when the client terminates, the resource delete function
    triggers a use-after-free.

    Introduced in: X11R6
    Fixed in: xorg-server-21.1.19 and xwayland-24.1.9
    Fix: https://gitlab.freedesktop.org/xorg/xserver/-/commit/99790a2c
         https://gitlab.freedesktop.org/xorg/xserver/-/commit/10c94238
    Found by: Jan-Niklas Sohn working with Trend Micro Zero Day Initiative.

3) CVE-2025-62231: Value overflow in Xkb extension XkbSetCompatMap()

    The XkbCompatMap structure stores some of its values using an unsigned
    short, but fails to check whether the sum of the input data might
    overflow the maximum unsigned short value.

    Introduced in: X11R6
    Fixed in: xorg-server-21.1.19 and xwayland-24.1.9
    Fix: https://gitlab.freedesktop.org/xorg/xserver/-/commit/475d9f49
    Found by: Jan-Niklas Sohn working with Trend Micro Zero Day Initiative.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>