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-2026-43280",
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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": "2026-05-01T14:12:55.998Z",
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"datePublished": "2026-05-06T11:29:01.562Z",
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"dateUpdated": "2026-10-19T19:16:25.879Z"
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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": "2026-08-05T12:27:02.301Z"
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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: Add bounds check on pat_index to prevent OOB kernel read in madvise\n\nWhen user provides a bogus pat_index value through the madvise IOCTL, the\nxe_pat_index_get_coh_mode() function performs an array access without\nvalidating bounds. This allows a malicious user to trigger an out-of-bounds\nkernel read from the xe->pat.table array.\n\nThe vulnerability exists because the validation in madvise_args_are_sane()\ndirectly calls xe_pat_index_get_coh_mode(xe, args->pat_index.val) without\nfirst checking if pat_index is within [0, xe->pat.n_entries).\n\nAlthough xe_pat_index_get_coh_mode() has a WARN_ON to catch this in debug\nbuilds, it still performs the unsafe array access in production kernels.\n\nv2(Matthew Auld)\n- Using array_index_nospec() to mitigate spectre attacks when the value\nis used\n\nv3(Matthew Auld)\n- Put the declarations at the start of the block\n\n(cherry picked from commit 944a3329b05510d55c69c2ef455136e2fc02de29)"
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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 vulnerable path is a local DRM xe ioctl, reached by opening an xe DRM render device and issuing DRM_IOCTL_XE_VM_CREATE followed by DRM_IOCTL_XE_MADVISE. It is not reachable from network, adjacent, or physical input.\nAC:L - Exploitation requires only attacker-controlled ioctl arguments with type DRM_XE_MEM_RANGE_ATTR_PAT and an out-of-range pat_index; no race or hard-to-control state is required. A valid VM id can be created by the same unprivileged caller.\nPR:L - The ioctl is registered with DRM_RENDER_ALLOW and no DRM_AUTH, DRM_MASTER, or DRM_ROOT_ONLY gate, so a normal local user with access to the render node can reach it. It does not require real root or capabilities.\nUI:N - No victim action is needed after the attacker has local execution and device-node access. The attacker directly opens the DRM node and submits the ioctl.\nS:U - The bug is in the host kernel DRM driver and impacts kernel resources under the same security authority. It is not a VM escape, IOMMU bypass, or other cross-scope boundary violation.\nC:H - The flaw is an attacker-controlled out-of-bounds kernel read from xe->pat.table via xe_pat_index_get_coh_mode(), with a u16 index range and no bounds check before the fix. Following the higher-severity rule for OOB kernel reads, this is scored as high confidentiality impact.\nI:N - The immediate primitive is an out-of-bounds read and validation oracle; the investigated path does not provide a direct kernel write or memory corruption primitive. A bad PAT value may be stored only if the OOB read happens to pass validation, but that does not establish arbitrary modification of protected data.\nA:H - Out-of-range pat_index values trigger WARN_ON in xe_pat_index_get_coh_mode(), and in hardened or panic_on_warn deployments this can panic the kernel. The same local user can repeatedly trigger the condition, so high availability impact is the higher defensible choice."
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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_madvise.c"
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],
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"versions": [
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{
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"version": "ada7486c5668db542a7d361268df931aca5b726a",
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"lessThan": "ffba51100ff61792fefbae11ca38ac1987a818dd",
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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": "ada7486c5668db542a7d361268df931aca5b726a",
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"lessThan": "79f52655567a6471ff3d0d6325ede91bb14461f4",
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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": "ada7486c5668db542a7d361268df931aca5b726a",
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"lessThan": "fbbe32618e97eff81577a01eb7d9adcd64a216d7",
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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_madvise.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": "6.18.16",
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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": "6.19.6",
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"lessThanOrEqual": "6.19.*",
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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",
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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": "6.18.16"
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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": "6.19.6"
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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": "7.0"
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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/ffba51100ff61792fefbae11ca38ac1987a818dd"
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},
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{
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"url": "https://git.kernel.org/stable/c/79f52655567a6471ff3d0d6325ede91bb14461f4"
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},
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{
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"url": "https://git.kernel.org/stable/c/fbbe32618e97eff81577a01eb7d9adcd64a216d7"
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}
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],
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"title": "drm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise",
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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-2026-43280",
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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": "2026-10-16T15:16:15.978847Z"
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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": "2026-10-19T19:16:25.879Z"
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}
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}
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]
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}
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} |