205 lines
11 KiB
JSON
205 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-2026-68265",
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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": "2026-07-30T09:28:09.378Z",
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"datePublished": "2026-08-10T12:01:40.271Z",
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"dateUpdated": "2026-10-19T20:58:58.789Z"
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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": "2026-08-17T05:01:57.952Z"
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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/xe/vm: Fix BO prefetch with CONSULT_MEM_ADVISE_PREF_LOC\n\nWhen prefetch region is DRM_XE_CONSULT_MEM_ADVISE_PREF_LOC for a BO VMA,\nthe code used it as an index into region_to_mem_type[], causing an\nout-of-bounds access since the value is -1.\n\nResolve the preferred location for BO VMAs directly: local VRAM on dGFX\n(using the BO's tile placement) or system memory on iGPU.\n\nDiscovered using AI-assisted static analysis confirmed by Intel Product\nSecurity.\n\nv2:\n-Fix null dereference\n\n(cherry picked from commit d9a4906ac03be9f6ed3f3b45c56c866b867fd75b)"
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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:L/A:H",
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"baseScore": 7.3,
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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 DRM_IOCTL_XE_VM_BIND ioctl on an xe render node (/dev/dri/renderD*), which requires local access to the device file; there is no network-facing path into drivers/gpu/drm/xe/xe_vm.c.\nAC:L - Fully deterministic and attacker-controlled: map any BO, then issue a PREFETCH bind op with prefetch_region = DRM_XE_CONSULT_MEM_ADVISE_PREF_LOC (-1), which the ioctl validator explicitly accepts, and the out-of-bounds index is taken every time. No race, no memory-layout grooming, and no special config beyond a normal Intel Xe GPU.\nPR:L - XE_VM_BIND is registered DRM_RENDER_ALLOW, so any unprivileged user or sandboxed/containerized process holding a render-node fd (the norm for desktop, Android and GPU containers) can drive the path; no capability or root is needed.\nUI:N - The attacker performs the entire sequence (create BO, bind, prefetch) from their own process via ioctls; no victim action or interaction is required.\nS:U - The out-of-bounds access and any resulting fault or misbehaviour stay within the kernel of the same machine and are not mediated across a VM, IOMMU or other security authority boundary.\nC:H - region_to_mem_type[] is a 3-entry array indexed with 0xFFFFFFFF, an unbounded wild read roughly 16 GB past the object rather than a small bounded overread; the loaded word is consumed by the driver and, on layouts where the address is readable, exposes memory the caller must never observe, so a high confidentiality impact is the defensible assessment.\nI:L - The out-of-bounds word is used directly as the mem_type argument to xe_bo_migrate(), so uninitialized/foreign data drives xe_bo_can_migrate(), mem_type_is_vram() and add_vram() placement decisions, letting a buffer object be moved to a memory region the caller never requested; the subsequent placement check bounds this to limited modification rather than an arbitrary write.\nA:H - The 0xFFFFFFFF index computes an address far outside any valid mapping (on x86-64 the module-relative offset wraps into a non-kernel address), so the read faults in kernel mode inside an in-progress drm_exec transaction holding VM and BO locks, producing an oops and a wedged GPU context — a repeatable crash any local user can trigger."
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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/xe/xe_vm.c"
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],
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"versions": [
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{
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"version": "c1bb69a2e8e2d55c3725e304d8b8fd189ee43fbe",
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"lessThan": "d256dac008d1d9e6378aa1a5454e89a8292d174c",
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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": "c1bb69a2e8e2d55c3725e304d8b8fd189ee43fbe",
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"lessThan": "c4affa4e8bc8086b4d3e8d6cf1055a624f813d72",
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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": "c1bb69a2e8e2d55c3725e304d8b8fd189ee43fbe",
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"lessThan": "7bc597ce74bab4153b2009c92eccf889e9d74044",
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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/xe/xe_vm.c"
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],
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"versions": [
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{
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"version": "6.18",
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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": "6.18",
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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": "6.18.44",
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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": "7.1.6",
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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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{
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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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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.18",
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"versionEndExcluding": "6.18.44"
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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": "6.18",
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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": "6.18",
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"versionEndExcluding": "7.2"
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}
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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/d256dac008d1d9e6378aa1a5454e89a8292d174c"
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},
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{
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"url": "https://git.kernel.org/stable/c/c4affa4e8bc8086b4d3e8d6cf1055a624f813d72"
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},
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{
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"url": "https://git.kernel.org/stable/c/7bc597ce74bab4153b2009c92eccf889e9d74044"
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}
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],
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"title": "drm/xe/vm: Fix BO prefetch with CONSULT_MEM_ADVISE_PREF_LOC",
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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-2026-68265",
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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": "2026-10-16T15:46:24.156978Z"
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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-125",
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"description": "CWE-125 Out-of-bounds Read"
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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": "2026-10-19T20:58:58.789Z"
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}
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}
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]
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}
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} |