fkie_cve-2023-53647
Vulnerability from fkie_nvd
Published
2025-10-07 16:15
Modified
2025-10-08 19:38
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Don't dereference ACPI root object handle Since the commit referenced in the Fixes: tag below the VMBus client driver is walking the ACPI namespace up from the VMBus ACPI device to the ACPI namespace root object trying to find Hyper-V MMIO ranges. However, if it is not able to find them it ends trying to walk resources of the ACPI namespace root object itself. This object has all-ones handle, which causes a NULL pointer dereference in the ACPI code (from dereferencing this pointer with an offset). This in turn causes an oops on boot with VMBus host implementations that do not provide Hyper-V MMIO ranges in their VMBus ACPI device or its ancestors. The QEMU VMBus implementation is an example of such implementation. I guess providing these ranges is optional, since all tested Windows versions seem to be able to use VMBus devices without them. Fix this by explicitly terminating the lookup at the ACPI namespace root object. Note that Linux guests under KVM/QEMU do not use the Hyper-V PV interface by default - they only do so if the KVM PV interface is missing or disabled. Example stack trace of such oops: [ 3.710827] ? __die+0x1f/0x60 [ 3.715030] ? page_fault_oops+0x159/0x460 [ 3.716008] ? exc_page_fault+0x73/0x170 [ 3.716959] ? asm_exc_page_fault+0x22/0x30 [ 3.717957] ? acpi_ns_lookup+0x7a/0x4b0 [ 3.718898] ? acpi_ns_internalize_name+0x79/0xc0 [ 3.720018] acpi_ns_get_node_unlocked+0xb5/0xe0 [ 3.721120] ? acpi_ns_check_object_type+0xfe/0x200 [ 3.722285] ? acpi_rs_convert_aml_to_resource+0x37/0x6e0 [ 3.723559] ? down_timeout+0x3a/0x60 [ 3.724455] ? acpi_ns_get_node+0x3a/0x60 [ 3.725412] acpi_ns_get_node+0x3a/0x60 [ 3.726335] acpi_ns_evaluate+0x1c3/0x2c0 [ 3.727295] acpi_ut_evaluate_object+0x64/0x1b0 [ 3.728400] acpi_rs_get_method_data+0x2b/0x70 [ 3.729476] ? vmbus_platform_driver_probe+0x1d0/0x1d0 [hv_vmbus] [ 3.730940] ? vmbus_platform_driver_probe+0x1d0/0x1d0 [hv_vmbus] [ 3.732411] acpi_walk_resources+0x78/0xd0 [ 3.733398] vmbus_platform_driver_probe+0x9f/0x1d0 [hv_vmbus] [ 3.734802] platform_probe+0x3d/0x90 [ 3.735684] really_probe+0x19b/0x400 [ 3.736570] ? __device_attach_driver+0x100/0x100 [ 3.737697] __driver_probe_device+0x78/0x160 [ 3.738746] driver_probe_device+0x1f/0x90 [ 3.739743] __driver_attach+0xc2/0x1b0 [ 3.740671] bus_for_each_dev+0x70/0xc0 [ 3.741601] bus_add_driver+0x10e/0x210 [ 3.742527] driver_register+0x55/0xf0 [ 3.744412] ? 0xffffffffc039a000 [ 3.745207] hv_acpi_init+0x3c/0x1000 [hv_vmbus]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64f09d45e94547fbf219f36d1d02ac42742c028c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/78e04bbff849b51b56f5925b1945db2c6e128b61
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96db43aced395844a7abc9a0a5cc702513e3534a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9fc162c59edc841032a3553eb2334320abab0784
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: hv: vmbus: Don\u0027t dereference ACPI root object handle\n\nSince the commit referenced in the Fixes: tag below the VMBus client driver\nis walking the ACPI namespace up from the VMBus ACPI device to the ACPI\nnamespace root object trying to find Hyper-V MMIO ranges.\n\nHowever, if it is not able to find them it ends trying to walk resources of\nthe ACPI namespace root object itself.\nThis object has all-ones handle, which causes a NULL pointer dereference\nin the ACPI code (from dereferencing this pointer with an offset).\n\nThis in turn causes an oops on boot with VMBus host implementations that do\nnot provide Hyper-V MMIO ranges in their VMBus ACPI device or its\nancestors.\nThe QEMU VMBus implementation is an example of such implementation.\n\nI guess providing these ranges is optional, since all tested Windows\nversions seem to be able to use VMBus devices without them.\n\nFix this by explicitly terminating the lookup at the ACPI namespace root\nobject.\n\nNote that Linux guests under KVM/QEMU do not use the Hyper-V PV interface\nby default - they only do so if the KVM PV interface is missing or\ndisabled.\n\nExample stack trace of such oops:\n[ 3.710827] ? __die+0x1f/0x60\n[ 3.715030] ? page_fault_oops+0x159/0x460\n[ 3.716008] ? exc_page_fault+0x73/0x170\n[ 3.716959] ? asm_exc_page_fault+0x22/0x30\n[ 3.717957] ? acpi_ns_lookup+0x7a/0x4b0\n[ 3.718898] ? acpi_ns_internalize_name+0x79/0xc0\n[ 3.720018] acpi_ns_get_node_unlocked+0xb5/0xe0\n[ 3.721120] ? acpi_ns_check_object_type+0xfe/0x200\n[ 3.722285] ? acpi_rs_convert_aml_to_resource+0x37/0x6e0\n[ 3.723559] ? down_timeout+0x3a/0x60\n[ 3.724455] ? acpi_ns_get_node+0x3a/0x60\n[ 3.725412] acpi_ns_get_node+0x3a/0x60\n[ 3.726335] acpi_ns_evaluate+0x1c3/0x2c0\n[ 3.727295] acpi_ut_evaluate_object+0x64/0x1b0\n[ 3.728400] acpi_rs_get_method_data+0x2b/0x70\n[ 3.729476] ? vmbus_platform_driver_probe+0x1d0/0x1d0 [hv_vmbus]\n[ 3.730940] ? vmbus_platform_driver_probe+0x1d0/0x1d0 [hv_vmbus]\n[ 3.732411] acpi_walk_resources+0x78/0xd0\n[ 3.733398] vmbus_platform_driver_probe+0x9f/0x1d0 [hv_vmbus]\n[ 3.734802] platform_probe+0x3d/0x90\n[ 3.735684] really_probe+0x19b/0x400\n[ 3.736570] ? __device_attach_driver+0x100/0x100\n[ 3.737697] __driver_probe_device+0x78/0x160\n[ 3.738746] driver_probe_device+0x1f/0x90\n[ 3.739743] __driver_attach+0xc2/0x1b0\n[ 3.740671] bus_for_each_dev+0x70/0xc0\n[ 3.741601] bus_add_driver+0x10e/0x210\n[ 3.742527] driver_register+0x55/0xf0\n[ 3.744412] ? 0xffffffffc039a000\n[ 3.745207] hv_acpi_init+0x3c/0x1000 [hv_vmbus]"
    }
  ],
  "id": "CVE-2023-53647",
  "lastModified": "2025-10-08T19:38:09.863",
  "metrics": {},
  "published": "2025-10-07T16:15:48.130",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/64f09d45e94547fbf219f36d1d02ac42742c028c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/78e04bbff849b51b56f5925b1945db2c6e128b61"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/96db43aced395844a7abc9a0a5cc702513e3534a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9fc162c59edc841032a3553eb2334320abab0784"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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