463 lines
21 KiB
JSON
463 lines
21 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-2021-47354",
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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": "2024-05-21T14:28:16.986Z",
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"datePublished": "2024-05-21T14:35:57.772Z",
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"dateUpdated": "2026-08-11T02:05:17.211Z"
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},
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},
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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/sched: Avoid data corruptions\n\nWait for all dependencies of a job to complete before\nkilling it to avoid data corruptions."
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}
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{
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"value": "AV:L - Exploitation requires local access to a DRM render node (/dev/dri/renderD*) and GPU job submission ioctls; the vulnerable kill path runs on entity teardown after close or process exit, not from network packet processing.\nAC:L - An attacker can reliably trigger the bug by submitting jobs that depend on a fence they control (or a long-running prior job), then closing the DRM fd so flush times out, or exiting with SIGKILL so remaining queued jobs are killed without dependency waits.\nPR:L - Render nodes are usable by unprivileged users (render/video group on desktops, app GPU access on Android); no root or init-namespace capabilities are required to open the device and submit jobs.\nUI:N - The attacker performs submission and teardown themselves; no separate victim action is required to hit the kill path or to cause device-wide GPU faults/resets.\nS:U - Impact stays within the host kernel/GPU device authority (corrupted GPU buffers and possible GPU reset); this is not a VM escape, IOMMU bypass, or other cross-boundary scope change.\nC:N - The defect is broken fence ordering that races GPU accesses and corrupts buffer contents; it does not provide a new arbitrary read or confidential-memory disclosure primitive beyond data already reachable via shared mappings.\nI:H - Signaling a job finished and freeing it before its dependencies complete breaks the dma-resv/implicit-sync chain, so other clients' jobs can run concurrently with unfinished dependent GPU work and corrupt shared or subsequently synchronized GPU buffers.\nA:H - The resulting conflicting GPU accesses can induce GPU page faults, hangs, and device resets that deny graphics/compute availability system-wide for other users of the same GPU."
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