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Patch xorg-x11-server-Xwayland for CVE-2025-62231, CVE-2025-62229 
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‎SPECS/xorg-x11-server-Xwayland/CVE-2025-62229.patch‎

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From c6353d52a931f5f126f79b4d7730ea1a295eb3b1 Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <[email protected]>
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Date: Wed, 2 Jul 2025 09:46:22 +0200
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Subject: [PATCH 1/2] present: Fix use-after-free in present_create_notifies()
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Using the Present extension, if an error occurs while processing and
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adding the notifications after presenting a pixmap, the function
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present_create_notifies() will clean up and remove the notifications
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it added.
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However, there are two different code paths that can lead to an error
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creating the notify, one being before the notify is being added to the
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list, and another one after the notify is added.
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When the error occurs before it's been added, it removes the elements up
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to the last added element, instead of the actual number of elements
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which were added.
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As a result, in case of error, as with an invalid window for example, it
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leaves a dangling pointer to the last element, leading to a use after
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free case later:
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| Invalid write of size 8
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| at 0x5361D5: present_clear_window_notifies (present_notify.c:42)
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| by 0x534A56: present_destroy_window (present_screen.c:107)
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| by 0x41E441: xwl_destroy_window (xwayland-window.c:1959)
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| by 0x4F9EC9: compDestroyWindow (compwindow.c:622)
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| by 0x51EAC4: damageDestroyWindow (damage.c:1592)
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| by 0x4FDC29: DbeDestroyWindow (dbe.c:1291)
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| by 0x4EAC55: FreeWindowResources (window.c:1023)
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| by 0x4EAF59: DeleteWindow (window.c:1091)
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| by 0x4DE59A: doFreeResource (resource.c:890)
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| by 0x4DEFB2: FreeClientResources (resource.c:1156)
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| by 0x4A9AFB: CloseDownClient (dispatch.c:3567)
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| by 0x5DCC78: ClientReady (connection.c:603)
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| Address 0x16126200 is 16 bytes inside a block of size 2,048 free'd
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| at 0x4841E43: free (vg_replace_malloc.c:989)
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| by 0x5363DD: present_destroy_notifies (present_notify.c:111)
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| by 0x53638D: present_create_notifies (present_notify.c:100)
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| by 0x5368E9: proc_present_pixmap_common (present_request.c:164)
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| by 0x536A7D: proc_present_pixmap (present_request.c:189)
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| by 0x536FA9: proc_present_dispatch (present_request.c:337)
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| by 0x4A1E4E: Dispatch (dispatch.c:561)
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| by 0x4B00F1: dix_main (main.c:284)
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| by 0x42879D: main (stubmain.c:34)
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| Block was alloc'd at
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| at 0x48463F3: calloc (vg_replace_malloc.c:1675)
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| by 0x5362A1: present_create_notifies (present_notify.c:81)
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| by 0x5368E9: proc_present_pixmap_common (present_request.c:164)
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| by 0x536A7D: proc_present_pixmap (present_request.c:189)
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| by 0x536FA9: proc_present_dispatch (present_request.c:337)
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| by 0x4A1E4E: Dispatch (dispatch.c:561)
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| by 0x4B00F1: dix_main (main.c:284)
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| by 0x42879D: main (stubmain.c:34)
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To fix the issue, count and remove the actual number of notify elements
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added in case of error.
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CVE-2025-62229, ZDI-CAN-27238
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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 <[email protected]>
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Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2086>
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---
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present/present_notify.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/present/present_notify.c b/present/present_notify.c
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index 4459549..00b3b68 100644
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--- a/present/present_notify.c
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+++ b/present/present_notify.c
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@@ -90,7 +90,7 @@ present_create_notifies(ClientPtr client, int num_notifies, xPresentNotify *x_no
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if (status != Success)
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goto bail;
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- added = i;
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+ added++;
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}
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return Success;
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--
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2.45.4
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From 4505bdae9a209e3ec014fa3a65241dbee65cc80e Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <[email protected]>
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Date: Wed, 10 Sep 2025 15:58:57 +0200
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Subject: [PATCH 2/2] xkb: Free the XKB resource when freeing XkbInterest
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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XkbRemoveResourceClient() would free the XkbInterest data associated
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with the device, but not the resource associated with it.
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As a result, when the client terminates, the resource delete function
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gets called and accesses already freed memory:
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| Invalid read of size 8
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| at 0x5BC0C0: XkbRemoveResourceClient (xkbEvents.c:1047)
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| by 0x5B3391: XkbClientGone (xkb.c:7094)
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| by 0x4DF138: doFreeResource (resource.c:890)
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| by 0x4DFB50: FreeClientResources (resource.c:1156)
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| by 0x4A9A59: CloseDownClient (dispatch.c:3550)
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| by 0x5E0A53: ClientReady (connection.c:601)
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| by 0x5E4FEF: ospoll_wait (ospoll.c:657)
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| by 0x5DC834: WaitForSomething (WaitFor.c:206)
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| by 0x4A1BA5: Dispatch (dispatch.c:491)
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| by 0x4B0070: dix_main (main.c:277)
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| by 0x4285E7: main (stubmain.c:34)
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| Address 0x1893e278 is 184 bytes inside a block of size 928 free'd
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| at 0x4842E43: free (vg_replace_malloc.c:989)
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| by 0x49C1A6: CloseDevice (devices.c:1067)
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| by 0x49C522: CloseOneDevice (devices.c:1193)
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| by 0x49C6E4: RemoveDevice (devices.c:1244)
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| by 0x5873D4: remove_master (xichangehierarchy.c:348)
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| by 0x587921: ProcXIChangeHierarchy (xichangehierarchy.c:504)
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| by 0x579BF1: ProcIDispatch (extinit.c:390)
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| by 0x4A1D85: Dispatch (dispatch.c:551)
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| by 0x4B0070: dix_main (main.c:277)
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| by 0x4285E7: main (stubmain.c:34)
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| Block was alloc'd at
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| at 0x48473F3: calloc (vg_replace_malloc.c:1675)
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| by 0x49A118: AddInputDevice (devices.c:262)
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| by 0x4A0E58: AllocDevicePair (devices.c:2846)
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| by 0x5866EE: add_master (xichangehierarchy.c:153)
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| by 0x5878C2: ProcXIChangeHierarchy (xichangehierarchy.c:493)
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| by 0x579BF1: ProcIDispatch (extinit.c:390)
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| by 0x4A1D85: Dispatch (dispatch.c:551)
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| by 0x4B0070: dix_main (main.c:277)
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| by 0x4285E7: main (stubmain.c:34)
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To avoid that issue, make sure to free the resources when freeing the
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device XkbInterest data.
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CVE-2025-62230, ZDI-CAN-27545
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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 <[email protected]>
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Reviewed-by: Michel Dänzer <[email protected]>
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Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2086>
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Signed-off-by: rpm-build <rpm-build>
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Upstream-reference: https://gitlab.freedesktop.org/xorg/xserver/-/commit/5a4286b1.patch https://gitlab.freedesktop.org/ofourdan/xserver/-/commit/10c94238bdad17c11707e0bdaaa3a9cd54c504be.patch
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---
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xkb/xkbEvents.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/xkb/xkbEvents.c b/xkb/xkbEvents.c
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index f8f65d4..7c669c9 100644
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--- a/xkb/xkbEvents.c
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+++ b/xkb/xkbEvents.c
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@@ -1055,6 +1055,7 @@ XkbRemoveResourceClient(DevicePtr inDev, XID id)
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autoCtrls = interest->autoCtrls;
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autoValues = interest->autoCtrlValues;
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client = interest->client;
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+ FreeResource(interest->resource, RT_XKBCLIENT);
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free(interest);
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found = TRUE;
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}
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@@ -1066,6 +1067,7 @@ XkbRemoveResourceClient(DevicePtr inDev, XID id)
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autoCtrls = victim->autoCtrls;
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autoValues = victim->autoCtrlValues;
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client = victim->client;
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+ FreeResource(victim->resource, RT_XKBCLIENT);
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free(victim);
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found = TRUE;
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}
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--
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2.45.4
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‎SPECS/xorg-x11-server-Xwayland/CVE-2025-62231.patch‎

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From ca67897cd9579953a09c41508ec0eb2e31ed7cce Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <[email protected]>
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Date: Wed, 10 Sep 2025 16:30:29 +0200
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Subject: [PATCH] xkb: Prevent overflow in XkbSetCompatMap()
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The XkbCompatMap structure stores its "num_si" and "size_si" fields
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using an unsigned short.
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However, the function _XkbSetCompatMap() will store the sum of the
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input data "firstSI" and "nSI" in both XkbCompatMap's "num_si" and
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"size_si" without first checking if the sum overflows the maximum
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unsigned short value, leading to a possible overflow.
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To avoid the issue, check whether the sum does not exceed the maximum
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unsigned short value, or return a "BadValue" error otherwise.
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CVE-2025-62231, ZDI-CAN-27560
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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 <[email protected]>
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Reviewed-by: Michel Dänzer <[email protected]>
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Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2086>
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Signed-off-by: rpm-build <rpm-build>
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Upstream-reference: https://gitlab.freedesktop.org/xorg/xserver/-/commit/475d9f49.patch
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---
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xkb/xkb.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/xkb/xkb.c b/xkb/xkb.c
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index ac154e2..924dfec 100644
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--- a/xkb/xkb.c
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+++ b/xkb/xkb.c
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@@ -2990,6 +2990,8 @@ _XkbSetCompatMap(ClientPtr client, DeviceIntPtr dev,
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XkbSymInterpretPtr sym;
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unsigned int skipped = 0;
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+ if ((unsigned) (req->firstSI + req->nSI) > USHRT_MAX)
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+ return BadValue;
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if ((unsigned) (req->firstSI + req->nSI) > compat->size_si) {
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compat->num_si = compat->size_si = req->firstSI + req->nSI;
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compat->sym_interpret = reallocarray(compat->sym_interpret,
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--
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2.45.4
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‎SPECS/xorg-x11-server-Xwayland/xorg-x11-server-Xwayland.spec‎

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@@ -11,7 +11,7 @@ Distribution: Azure Linux
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Summary: Xwayland
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Name: xorg-x11-server-Xwayland
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Version: 24.1.6
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Release: 2%{?dist}
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Release: 3%{?dist}
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License: MIT
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URL: http://www.x.org
@@ -93,6 +93,8 @@ Patch1: CVE-2025-49177.patch
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Patch2: CVE-2025-49178.patch
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Patch3: CVE-2025-49179.patch
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Patch4: CVE-2025-49180.patch
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Patch5: CVE-2025-62229.patch
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Patch6: CVE-2025-62231.patch
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%description
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Xwayland is an X server for running X clients under Wayland.
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%{_libdir}/pkgconfig/xwayland.pc
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%changelog
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* Fri Oct 31 2025 Azure Linux Security Servicing Account <[email protected]> - 24.1.6-3
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- Patch for CVE-2025-62231, CVE-2025-62229
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* Mon Jun 23 2025 Kevin Lockwood <[email protected]> - 24.1.6-2
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- Add patch for CVE-2025-49175
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- Add patch for CVE-2025-49177

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