ac18fd1e56
- Fix CVE-2025-26595 xorg-x11-server Buffer overflow in XkbVModMaskText() - Fix CVE-2025-26596 xorg-x11-server Heap overflow in XkbWriteKeySyms() - Fix CVE-2025-26597 xorg-x11-server Buffer overflow in XkbChangeTypesOfKey() - Fix CVE-2025-26598 xorg-x11-server Out-of-bounds write in CreatePointerBarrierClient() - Fix CVE-2025-26599 xorg-x11-server Use of uninitialized pointer in compRedirectWindow() - Fix CVE-2025-26600 xorg-x11-server Use-after-free in PlayReleasedEvents() - Fix CVE-2025-26601 xorg-x11-server Use-after-free in SyncInitTrigger()
42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
From c5114475db18f29d639537d60e135bdfc11a5d3a Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <ofourdan@redhat.com>
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Date: Thu, 28 Nov 2024 14:09:04 +0100
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Subject: [PATCH xserver] xkb: Fix buffer overflow in XkbChangeTypesOfKey()
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If XkbChangeTypesOfKey() is called with nGroups == 0, it will resize the
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key syms to 0 but leave the key actions unchanged.
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If later, the same function is called with a non-zero value for nGroups,
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this will cause a buffer overflow because the key actions are of the wrong
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size.
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To avoid the issue, make sure to resize both the key syms and key actions
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when nGroups is 0.
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CVE-2025-26597, ZDI-CAN-25683
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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: Olivier Fourdan <ofourdan@redhat.com>
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Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
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---
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xkb/XKBMisc.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/xkb/XKBMisc.c b/xkb/XKBMisc.c
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index abbfed90e..fd180fad2 100644
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--- a/xkb/XKBMisc.c
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+++ b/xkb/XKBMisc.c
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@@ -553,6 +553,7 @@ XkbChangeTypesOfKey(XkbDescPtr xkb,
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i = XkbSetNumGroups(i, 0);
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xkb->map->key_sym_map[key].group_info = i;
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XkbResizeKeySyms(xkb, key, 0);
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+ XkbResizeKeyActions(xkb, key, 0);
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return Success;
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}
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--
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2.48.1
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