From: Vijay Anusuri <vanus...@mvista.com> Upstream-Status: Backport from https://gitlab.freedesktop.org/xorg/xserver/-/commit/6e0f332b
Signed-off-by: Vijay Anusuri <vanus...@mvista.com> --- .../xserver-xorg/CVE-2025-26600.patch | 68 +++++++++++++++++++ .../xorg-xserver/xserver-xorg_21.1.8.bb | 1 + 2 files changed, 69 insertions(+) create mode 100644 meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2025-26600.patch diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2025-26600.patch b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2025-26600.patch new file mode 100644 index 0000000000..43b47b3ca3 --- /dev/null +++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg/CVE-2025-26600.patch @@ -0,0 +1,68 @@ +From 6e0f332ba4c8b8c9a9945dc9d7989bfe06f80e14 Mon Sep 17 00:00:00 2001 +From: Olivier Fourdan <ofour...@redhat.com> +Date: Mon, 16 Dec 2024 16:18:04 +0100 +Subject: [PATCH] dix: Dequeue pending events on frozen device on removal + +When a device is removed while still frozen, the events queued for that +device remain while the device itself is freed. + +As a result, replaying the events will cause a use after free. + +To avoid the issue, make sure to dequeue and free any pending events on +a frozen device when removed. + +CVE-2025-26600, ZDI-CAN-25871 + +This vulnerability was discovered by: +Jan-Niklas Sohn working with Trend Micro Zero Day Initiative + +Signed-off-by: Olivier Fourdan <ofour...@redhat.com> +Reviewed-by: Peter Hutterer <peter.hutte...@who-t.net> +Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1828> + +Upstream-Status: Backport [https://gitlab.freedesktop.org/xorg/xserver/-/commit/6e0f332b] +CVE: CVE-2025-26600 +Signed-off-by: Vijay Anusuri <vanus...@mvista.com> +--- + dix/devices.c | 18 ++++++++++++++++++ + 1 file changed, 18 insertions(+) + +diff --git a/dix/devices.c b/dix/devices.c +index 1516147..459f1ed 100644 +--- a/dix/devices.c ++++ b/dix/devices.c +@@ -962,6 +962,23 @@ FreeAllDeviceClasses(ClassesPtr classes) + + } + ++static void ++FreePendingFrozenDeviceEvents(DeviceIntPtr dev) ++{ ++ QdEventPtr qe, tmp; ++ ++ if (!dev->deviceGrab.sync.frozen) ++ return; ++ ++ /* Dequeue any frozen pending events */ ++ xorg_list_for_each_entry_safe(qe, tmp, &syncEvents.pending, next) { ++ if (qe->device == dev) { ++ xorg_list_del(&qe->next); ++ free(qe); ++ } ++ } ++} ++ + /** + * Close down a device and free all resources. + * Once closed down, the driver will probably not expect you that you'll ever +@@ -1026,6 +1043,7 @@ CloseDevice(DeviceIntPtr dev) + free(dev->last.touches[j].valuators); + free(dev->last.touches); + dev->config_info = NULL; ++ FreePendingFrozenDeviceEvents(dev); + dixFreePrivates(dev->devPrivates, PRIVATE_DEVICE); + free(dev); + } +-- +2.25.1 + diff --git a/meta/recipes-graphics/xorg-xserver/xserver-xorg_21.1.8.bb b/meta/recipes-graphics/xorg-xserver/xserver-xorg_21.1.8.bb index e50d7bfb9e..d7b0e7b589 100644 --- a/meta/recipes-graphics/xorg-xserver/xserver-xorg_21.1.8.bb +++ b/meta/recipes-graphics/xorg-xserver/xserver-xorg_21.1.8.bb @@ -30,6 +30,7 @@ SRC_URI += "file://0001-xf86pciBus.c-use-Intel-ddx-only-for-pre-gen4-hardwar.pat file://CVE-2025-26598.patch \ file://CVE-2025-26599-1.patch \ file://CVE-2025-26599-2.patch \ + file://CVE-2025-26600.patch \ " SRC_URI[sha256sum] = "38aadb735650c8024ee25211c190bf8aad844c5f59632761ab1ef4c4d5aeb152" -- 2.43.0
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