xorg-x11-server/SOURCES/0001-Xi-fix-potential-use-after-free-in-DeepCopyPointerCl.patch
2023-05-16 06:08:51 +00:00

36 lines
1.1 KiB
Diff

From 7150ba655c0cc08fa6ded309b81265bb672f2869 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Wed, 25 Jan 2023 11:41:40 +1000
Subject: [PATCH xserver] Xi: fix potential use-after-free in
DeepCopyPointerClasses
CVE-2023-0494, ZDI-CAN 19596
This vulnerability was discovered by:
Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
Xi/exevents.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/Xi/exevents.c b/Xi/exevents.c
index 217baa9561..dcd4efb3bc 100644
--- a/Xi/exevents.c
+++ b/Xi/exevents.c
@@ -619,8 +619,10 @@ DeepCopyPointerClasses(DeviceIntPtr from, DeviceIntPtr to)
memcpy(to->button->xkb_acts, from->button->xkb_acts,
sizeof(XkbAction));
}
- else
+ else {
free(to->button->xkb_acts);
+ to->button->xkb_acts = NULL;
+ }
memcpy(to->button->labels, from->button->labels,
from->button->numButtons * sizeof(Atom));
--
2.39.0