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