xserver-xorg: Fix for CVE-2025-26597

Upstream-Status: Backport from https://gitlab.freedesktop.org/xorg/xserver/-/commit/0e4ed949

(From OE-Core rev: 9d095e34da2adde63358a878cfac45ea28727bdf)

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2025-26597.patch

@@ -0,0 +1,46 @@
+From 0e4ed94952b255c04fe910f6a1d9c852878dcd64 Mon Sep 17 00:00:00 2001
+From: Olivier Fourdan <ofourdan@redhat.com>
+Date: Thu, 28 Nov 2024 14:09:04 +0100
+Subject: [PATCH] xkb: Fix buffer overflow in XkbChangeTypesOfKey()
+
+If XkbChangeTypesOfKey() is called with nGroups == 0, it will resize the
+key syms to 0 but leave the key actions unchanged.
+
+If later, the same function is called with a non-zero value for nGroups,
+this will cause a buffer overflow because the key actions are of the wrong
+size.
+
+To avoid the issue, make sure to resize both the key syms and key actions
+when nGroups is 0.
+
+CVE-2025-26597, ZDI-CAN-25683
+
+This vulnerability was discovered by:
+Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
+
+Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
+Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
+Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1828>
+
+Upstream-Status: Backport [https://gitlab.freedesktop.org/xorg/xserver/-/commit/0e4ed949]
+CVE: CVE-2025-26597
+Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
+---
+ xkb/XKBMisc.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/xkb/XKBMisc.c b/xkb/XKBMisc.c
+index abbfed90eb..fd180fad2c 100644
+--- a/xkb/XKBMisc.c
++++ b/xkb/XKBMisc.c
+@@ -553,6 +553,7 @@ XkbChangeTypesOfKey(XkbDescPtr xkb,
+         i = XkbSetNumGroups(i, 0);
+         xkb->map->key_sym_map[key].group_info = i;
+         XkbResizeKeySyms(xkb, key, 0);
++        XkbResizeKeyActions(xkb, key, 0);
+         return Success;
+     }
+ 
+-- 
+GitLab
+

meta/recipes-graphics/xorg-xserver/xserver-xorg_21.1.8.bb

@@ -26,6 +26,7 @@ SRC_URI += "file://0001-xf86pciBus.c-use-Intel-ddx-only-for-pre-gen4-hardwar.pat
            file://CVE-2025-26594-2.patch \
            file://CVE-2025-26595.patch \
            file://CVE-2025-26596.patch \
+           file://CVE-2025-26597.patch \
            "
 SRC_URI[sha256sum] = "38aadb735650c8024ee25211c190bf8aad844c5f59632761ab1ef4c4d5aeb152"