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36 lines
1 KiB
Diff
36 lines
1 KiB
Diff
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From ccdd431cd8f1cabae9d744f0514b6533c438908c Mon Sep 17 00:00:00 2001
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From: Peter Hutterer <peter.hutterer@who-t.net>
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Date: Mon, 5 Dec 2022 15:55:54 +1000
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Subject: [PATCH] xkb: reset the radio_groups pointer to NULL after freeing it
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Unlike other elements of the keymap, this pointer was freed but not
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reset. On a subsequent XkbGetKbdByName request, the server may access
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already freed memory.
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CVE-2022-4283, ZDI-CAN-19530
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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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Acked-by: Olivier Fourdan <ofourdan@redhat.com>
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---
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xkb/xkbUtils.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/xkb/xkbUtils.c b/xkb/xkbUtils.c
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index dd089c204..3f5791a18 100644
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--- a/xkb/xkbUtils.c
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+++ b/xkb/xkbUtils.c
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@@ -1326,6 +1326,7 @@ _XkbCopyNames(XkbDescPtr src, XkbDescPtr dst)
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}
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else {
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free(dst->names->radio_groups);
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+ dst->names->radio_groups = NULL;
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}
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dst->names->num_rg = src->names->num_rg;
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--
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GitLab
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