214 lines
11 KiB
JSON
214 lines
11 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-2024-46730",
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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": "2024-09-11T15:12:18.256Z",
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"datePublished": "2024-09-18T06:32:25.524Z",
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"dateUpdated": "2026-10-30T12:19:15.979Z"
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},
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"shortName": "Linux",
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"dateUpdated": "2026-10-30T12:19:15.979Z"
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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/display: Ensure array index tg_inst won't be -1\n\n[WHY & HOW]\ntg_inst will be a negative if timing_generator_count equals 0, which\nshould be checked before used.\n\nThis fixes 2 OVERRUN issues reported by Coverity."
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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:H/A:H",
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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 code is reached only through DRM modeset ioctls on /dev/dri/card* (DRM_IOCTL_MODE_ATOMIC / SETCRTC) via amdgpu_dm_atomic_check() → dc_state_add_stream() → resource_map_pool_resources(). No network or remote input reaches this path.\nAC:L - Within an affected resource-pool configuration the negative index is taken deterministically on every stream-add whose pipe_idx exceeds timing_generator_count; there is no race to win and no memory-layout condition the attacker must guess, and the attacker chooses when to issue the modeset.\nPR:L - A local unprivileged user with a DRM fd holding master — the ordinary case for a logged-in console/graphical session, an Android compositor client, or a kiosk display stack — can issue the atomic modeset; no capability check exists anywhere on the path from the ioctl to acquire_otg_master_pipe_for_stream().\nUI:N - The attacker performs the modeset/stream-add entirely on their own; no action by another user or administrator is required.\nS:U - The corruption and its consequences stay inside the kernel's amdgpu display driver under the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The −1 index reads pointers outside the intended arrays and installs them as wrongly-typed objects, so subsequent accesses read struct fields (funcs, inst, dc_context contents) at mismatched offsets from adjacent kernel objects, exposing kernel pointers and enabling further disclosure through the type-confused reads.\nI:H - stream_res.opp — actually a struct dpp * — is written through (opp->mpcc_disconnect_pending[] stores and mpc_tree_params list manipulation corrupt the DPP object), and both stream_res.tg->funcs and stream_res.opp->funcs are read from offsets holding non-vtable data, including gamma-LUT bytes supplied by userspace, giving an indirect call through attacker-influenced memory and thus a control-flow hijack primitive.\nA:H - At minimum the wrongly-typed or NULL pointer is dereferenced and called through during pipe programming, producing an immediate kernel oops/panic in the display pipeline, repeatable at will by the local attacker."
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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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"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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"programFiles": [
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"drivers/gpu/drm/amd/display/dc/core/dc_resource.c"
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],
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"versions": [
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{
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"version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
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"lessThan": "1de84b6d65a7df30b5edc7208f828c4ecc8a7154",
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"status": "affected",
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"drivers/gpu/drm/amd/display/dc/core/dc_resource.c"
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],
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"versions": [
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{
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"version": "4.15",
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"version": "0",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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},
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{
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"version": "6.6.158",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.10.9",
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"lessThanOrEqual": "6.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11",
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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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]
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}
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],
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"cpeApplicability": [
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"operator": "OR",
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"negate": false,
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"versionStartIncluding": "4.15",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/1de84b6d65a7df30b5edc7208f828c4ecc8a7154"
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"url": "https://git.kernel.org/stable/c/687fe329f18ab0ab0496b20ed2cb003d4879d931"
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}
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],
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"title": "drm/amd/display: Ensure array index tg_inst won't be -1",
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"type": "ssvc",
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"content": {
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"timestamp": "2024-09-29T14:54:24.683078Z",
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"id": "CVE-2024-46730",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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"title": "CISA ADP Vulnrichment",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-09-29T14:54:39.429Z"
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} |