268 lines
13 KiB
JSON
268 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-2026-63846",
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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": "2026-07-19T07:54:57.016Z",
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"datePublished": "2026-07-19T14:04:39.674Z",
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"dateUpdated": "2026-10-30T12:27:12.843Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-30T12:27:12.843Z"
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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/jpeg: set no_user_fence for JPEG v3.0 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 4d7d774f100efb5089c86a1fb8c5bf47c63fc9ef)"
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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: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_IOCTL_AMDGPU_CS on an AMDGPU render node (/dev/dri/renderD*), requiring a local ioctl to submit a command buffer with AMDGPU_CHUNK_ID_FENCE to the JPEG v3.0 decode ring (AMDGPU_HW_IP_VCN_JPEG).\nAC:L - On affected VCN 3.0.x hardware with JPEG v3.0 (e.g. Navi 21/Sienna_Cichlid RX 6000 series), an attacker fully controls CS submission parameters and can reliably trigger the unsupported 64-bit user fence path without races or conditions beyond attacker control.\nPR:L - DRM_IOCTL_AMDGPU_CS is gated by DRM_AUTH|DRM_RENDER_ALLOW, requiring only local access to the render node available to unprivileged users in the render group or equivalent permissions, not root or special capabilities.\nUI:N - Exploitation requires no victim interaction beyond the attacker (or their process) opening the render node and submitting crafted GPU command buffers with user fences.\nS:U - The impact is confined to the attacker's GPU security context (their process VM and GPU mappings); exploitation does not cross VM, container, or IOMMU boundaries to affect other security authorities.\nC:H - The unsupported 64-bit user fence causes the GPU to perform unintended memory writes that can corrupt adjacent GPU-accessible memory, and memory corruption primitives can be leveraged for information disclosure.\nI:H - The GPU writes a fence sequence number via GPCOM to an attacker-influenced GPU virtual address, providing a controlled write primitive that can corrupt GPU memory and potentially be chained for further exploitation.\nA:H - Malformed fence operations on unsupported hardware can hang or fault the GPU subsystem, requiring a GPU reset and denying availability of graphics/compute workloads."
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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/jpeg_v3_0.c"
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],
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"versions": [
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{
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"version": "dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3",
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"lessThan": "34d72bb699305992d3190220e331a95bfd3e9f7f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"status": "affected",
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"status": "affected",
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},
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{
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"version": "dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3",
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"lessThan": "48ce00787e3fddd2b45692fc991b8ab128343da5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "dfd57dbf44ddc70c90c76f83b2deb46e5dd40ce3",
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"lessThan": "a2baf12eec41f246689e6a3f8619af1200031576",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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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/jpeg_v3_0.c"
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],
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"versions": [
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{
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"version": "5.9",
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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": "5.9",
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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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"versionType": "semver"
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},
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{
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"version": "6.6.141",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.91",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.33",
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"lessThanOrEqual": "6.18.*",
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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": "7.0.10",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.9",
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"versionEndExcluding": "6.1.191"
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/34d72bb699305992d3190220e331a95bfd3e9f7f"
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},
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{
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"url": "https://git.kernel.org/stable/c/ee035a9d3eed3a9f5a3e83c31a10b321c9598861"
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},
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"url": "https://git.kernel.org/stable/c/303da8279f195cc741adc52c1b44d6b64de63bb0"
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{
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"url": "https://git.kernel.org/stable/c/5ada37d7f736f9feeaa06a25e470a4c74e67a61a"
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},
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{
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"url": "https://git.kernel.org/stable/c/48ce00787e3fddd2b45692fc991b8ab128343da5"
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},
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{
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"url": "https://git.kernel.org/stable/c/a2baf12eec41f246689e6a3f8619af1200031576"
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}
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],
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"title": "drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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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-2026-63846",
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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": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:31:56.865035Z"
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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-20",
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"description": "CWE-20 Improper Input Validation"
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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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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T20:07:50.664Z"
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}
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}
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]
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}
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} |