283 lines
13 KiB
JSON
283 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2021-47551",
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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": "2024-05-24T15:02:54.832Z",
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"datePublished": "2024-05-24T15:09:54.635Z",
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"dateUpdated": "2026-08-05T08:48:20.962Z"
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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/amd/amdkfd: Fix kernel panic when reset failed and been triggered again\n\nIn SRIOV configuration, the reset may failed to bring asic back to normal but stop cpsch\nalready been called, the start_cpsch will not be called since there is no resume in this\ncase. When reset been triggered again, driver should avoid to do uninitialization again."
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}
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],
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"metrics": [
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable stop_cpsch path is reached during GPU reset of an AMD KFD device (via /dev/kfd or DRM render-node workloads that hang the GPU), requiring local access to the compute/graphics device nodes rather than network packet processing.\nAC:L - An attacker who can submit GPU work can induce an HWS hang that schedules reset; in SRIOV, amdgpu_device_reset_sriov retries after failure and re-enters stop_cpsch without start_cpsch, so the double-uninit is reliably hit once a reset fails or is retried.\nPR:L - Triggering requires only unprivileged access to /dev/kfd or a DRM render node (typically render-group membership), not real root or init-namespace capabilities.\nUI:N - The attacker triggers GPU hang and subsequent reset through their own device ioctls; no separate victim action is required.\nS:U - The double-free and panic occur in the same kernel that hosts the amdkfd driver (including a guest with an SRIOV VF); this does not cross a VM/IOMMU security boundary into the host.\nC:H - stop_cpsch frees dqm->fence_mem without NULLing it, so a second call is a use-after-free of the kfd_mem_obj; per UAF guidance this can be leveraged for arbitrary kernel read/disclosure primitives.\nI:H - The same dangling fence_mem leads to a double kfree and GTT SA bitmap corruption, and pm_uninit is invoked twice on a torn-down packet manager—memory corruption consistent with write/control-flow hijack primitives.\nA:H - The second stop_cpsch causes kernel panic/oops via UAF/double-free and NULL dereference in kernel_queue_uninit(pm->priv_queue) after priv_queue was already set to NULL."
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}
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]
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}
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],
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"affected": [
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{
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"product": "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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"programFiles": [
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"drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c"
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],
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"version": "5.15.7",
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"status": "unaffected",
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{
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"version": "5.16",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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"title": "drm/amd/amdkfd: Fix kernel panic when reset failed and been triggered again",
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"type": "CWE",
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"lang": "en",
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"description": "CWE-770 Allocation of Resources Without Limits or Throttling"
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"content": {
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"timestamp": "2024-05-28T15:41:59.377852Z",
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"id": "CVE-2021-47551",
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"options": [
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