275 lines
13 KiB
JSON
275 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveId": "CVE-2023-52678",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-03-07T14:49:46.887Z",
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"datePublished": "2024-05-17T14:24:42.715Z",
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"dateUpdated": "2026-08-05T09:10:59.732Z"
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},
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Confirm list is non-empty before utilizing list_first_entry in kfd_topology.c\n\nBefore using list_first_entry, make sure to check that list is not\nempty, if list is empty return -ENODATA.\n\nFixes the below:\ndrivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_topology.c:1347 kfd_create_indirect_link_prop() warn: can 'gpu_link' even be NULL?\ndrivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_topology.c:1428 kfd_add_peer_prop() warn: can 'iolink1' even be NULL?\ndrivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_topology.c:1433 kfd_add_peer_prop() warn: can 'iolink2' even be NULL?"
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},
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{
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"lang": "en",
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"value": "AV:L - The bug is in drm/amdkfd topology setup (`kfd_create_indirect_link_prop` / `kfd_add_peer_prop`) reached during local AMD GPU device initialization and exposed via local sysfs under `/sys/class/kfd/`; it is not reachable from the network stack.\nAC:L - Once a device with an empty `io_link_props` list is present (e.g., multi-GPU/P2P topology build), `list_first_entry` reliably returns a type-confused pointer with no race or other attacker-uncontrollable timing requirement.\nPR:L - Exploitation requires only an unprivileged local account; world-readable KFD topology sysfs (mode 0444) can be read without capabilities or `/dev/kfd` render-group membership.\nUI:N - No victim interaction is required; topology construction runs during device init and a local attacker can read the resulting sysfs properties directly.\nS:U - Impact remains within the host kernel’s security authority; this is not a VM escape, IOMMU bypass, or other cross-boundary scope change.\nC:H - On an empty list, `list_first_entry` type-confuses the list head as `kfd_iolink_properties`, and `memcpy` copies adjacent `kfd_topology_device` fields (including kernel pointers) into heap objects later exposed through sysfs properties.\nI:H - This is type confusion that fabricates and links corrupted iolink objects into kernel topology lists; per CVSS kernel guidance, type confusion is scored as High integrity impact.\nA:H - The corrupted `gpu` pointer (mapped from adjacent kobject storage) is later passed to `kfd_devcgroup_check_permission()`, which dereferences it as a `kfd_dev` and can oops/panic the kernel on sysfs read."
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}
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]
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}
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],
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"drivers/gpu/drm/amd/amdkfd/kfd_topology.c"
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"status": "unaffected",
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