184 lines
9.6 KiB
JSON
184 lines
9.6 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-2026-68103",
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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": "2026-07-30T09:28:09.368Z",
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"datePublished": "2026-08-10T11:58:19.317Z",
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"dateUpdated": "2026-10-19T20:58:50.510Z"
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},
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-17T04:58:51.492Z"
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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/amdgpu: reject mapping a reserved doorbell to a new queue\n\nWhen creating an user-queue, the user space\nprovides a doorbell BO handle and an offset within\nthe bo to obtain a doorbell.\n\nHowever current implementation using xa_store_irq()\nto store a doorbell, which allows a later queue created\nwith the same BO and offset parameters to overwrite an\nexisting queue and doorbell mapping.\n\nThis can cause problems like misrouting fence IRQ\nprocessing to a wrong queue, and mislead the cleanup\nprocess of one queue erasing the mapping of another queue.\n\nThis commit fixes this issue by replacing xa_store_irq with\nxa_insert_irq, which rejects mapping a reserved\ndoorbell to a newly created queue\n\n(cherry picked from commit 6244eae22966350db52faf9c1369d3b2ffc5de4e)"
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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:N/I:H/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 bug is reached only through the AMDGPU DRM_USERQ ioctl on a local render node (/dev/dri/renderD*); fence IRQ handling is driven by local GPU completion events, not remote network input.\nAC:L - An attacker can deterministically trigger the overwrite by issuing AMDGPU_USERQ_OP_CREATE with the same doorbell GEM handle and offset (same process) or by landing on the same global doorbell BAR index (shared-GPU hosts); no race or victim timing is required.\nPR:L - Exploitation requires only access to the AMDGPU render node granted to normal local users (e.g., render/video group on workstations, cloud GPU VMs, ROCm compute nodes); high-priority queue creation is optional and not needed for the attack.\nUI:N - The attacker triggers the flaw directly via ioctls; victims need only be running ordinary GPU compute/graphics workloads on the same device, with no additional user interaction.\nS:U - Impact is confined to kernel AMDGPU user-queue and fence state on the local GPU; it does not cross VM, IOMMU, or sandbox boundaries into another security authority.\nC:N - Misrouting fence IRQs corrupts queue-to-doorbell associations and synchronization but provides no kernel or victim memory read primitive; AMDGPU per-process VM isolation blocks direct disclosure of another tenant's GPU buffers.\nI:H - Silently overwriting the device-global doorbell xarray lets an attacker hijack another queue's fence IRQ handling and erase its mapping on teardown, corrupting kernel queue state and breaking GPU synchronization integrity for other workloads.\nA:H - Orphaned queues stop receiving fence IRQs, provoking hang detection and amdgpu_userq_mgr_reset_work paths that can force per-queue or full GPU recovery, denying GPU service to all users on shared AMD GPU systems."
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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/amdgpu/amdgpu_userq.c"
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],
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"versions": [
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{
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"lessThan": "1050d258c7c56066d2dcaedf8d0ef66364062adc",
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"status": "affected",
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]
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{
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"defaultStatus": "affected",
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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/amdgpu/amdgpu_userq.c"
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],
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"versions": [
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{
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"version": "6.16",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.16",
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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": "7.1.6",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.1.6"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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}
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/1050d258c7c56066d2dcaedf8d0ef66364062adc"
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},
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{
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"url": "https://git.kernel.org/stable/c/a609b6278bf3cde17eeee6620091465521e4b02c"
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}
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],
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"title": "drm/amdgpu: reject mapping a reserved doorbell to a new queue",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-68103",
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"role": "CISA Coordinator",
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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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"version": "2.0.3",
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"timestamp": "2026-10-16T15:43:48.984694Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-662",
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"description": "CWE-662 Improper Synchronization"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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