xwayland: Fix CVE-2025-26597

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

(From OE-Core rev: 6e19f26f4f152316badf3668b74cfc50d8d12528)

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

2 files changed, 47 insertions, 0 deletions

diff --git a/meta/recipes-graphics/xwayland/xwayland/CVE-2025-26597.patch b/meta/recipes-graphics/xwayland/xwayland/CVE-2025-26597.patch
new file mode 100644
index 0000000000..b0735d0b46
--- /dev/null
+++ b/meta/recipes-graphics/xwayland/xwayland/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
+
diff --git a/meta/recipes-graphics/xwayland/xwayland_23.2.5.bb b/meta/recipes-graphics/xwayland/xwayland_23.2.5.bb
index 63803a7a44..7f94c5e2e2 100644
--- a/meta/recipes-graphics/xwayland/xwayland_23.2.5.bb
+++ b/meta/recipes-graphics/xwayland/xwayland_23.2.5.bb
@@ -15,6 +15,7 @@ SRC_URI = "https://www.x.org/archive/individual/xserver/xwayland-${PV}.tar.xz \
            file://CVE-2025-26594-2.patch \
            file://CVE-2025-26595.patch \
            file://CVE-2025-26596.patch \
+           file://CVE-2025-26597.patch \
 "
 SRC_URI[sha256sum] = "33ec7ff2687a59faaa52b9b09aa8caf118e7ecb6aed8953f526a625ff9f4bd90"