383 lines
18 KiB
JSON
383 lines
18 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-2023-52867",
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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": "2024-05-21T15:19:24.262Z",
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"datePublished": "2024-05-21T15:31:57.866Z",
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"dateUpdated": "2026-08-05T09:11:44.110Z"
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},
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:11:44.110Z"
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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/radeon: possible buffer overflow\n\nBuffer 'afmt_status' of size 6 could overflow, since index 'afmt_idx' is\nchecked after access."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 7.1,
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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 flaw is in the local radeon IH IRQ path (PCI interrupt → radeon_driver_irq_handler_kms → evergreen_irq_process) on evergreen/sumo/btc/cayman/trinity GPUs; it is not reachable via network protocols or remote peers.\nAC:L - When an IH entry with src_id 44 and out-of-range src_data is present, the out-of-bounds afmt_status index is used deterministically with no race or layout dependency; under the uncertainty rule this is scored Low rather than requiring attacker-uncontrollable hardware glitches.\nPR:L - Reachability is on systems where an ordinary local account can use DRM/seat GPU access (render/primary nodes, HDMI audio activity that exercises AFMT IRQs), which does not require real init-namespace root; Low is chosen over High under the higher-severity rule.\nUI:N - IRQ processing runs in kernel interrupt context from GPU-generated IH entries; no separate victim action such as mounting a filesystem or opening a crafted file is required.\nS:U - Any resulting oops or memory access stays inside the host kernel/radeon driver authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - afmt_idx is taken from 28-bit IH src_data and used to index afmt_status[6] before the bounds check, yielding an unbounded out-of-bounds kernel read; per kernel CNA guidance such OOB reads are High unless strictly bounded.\nI:N - The only store (afmt_status[afmt_idx] &= ~AFMT_AZ_FORMAT_WTRIG) runs after if (afmt_idx > 5) break, so out-of-range indices never write; there is no OOB write or control-flow hijack primitive.\nA:H - A sufficiently large src_data makes the OOB read touch unmapped memory and oops in IRQ context; any kernel oops/panic is High availability impact."
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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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"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/radeon/evergreen.c"
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