201 lines
9.8 KiB
JSON
201 lines
9.8 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-2022-50329",
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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": "2025-09-15T14:18:36.815Z",
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"datePublished": "2025-09-15T14:49:32.123Z",
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"dateUpdated": "2026-10-15T21:31:20.243Z"
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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": "2026-08-05T08:58:13.157Z"
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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\nblock, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq\n\nCommit 64dc8c732f5c (\"block, bfq: fix possible uaf for 'bfqq->bic'\")\nwill access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq()\ncan free bfqq first, and then call bic_set_bfqq(), which will cause uaf.\n\nFix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq()."
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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 path runs in bfq_exit_icq during exit_io_context after local block I/O on a BFQ-managed device; it is reached via process exit/syscalls, not network or physical input.\nAC:L - An unprivileged attacker fully controls triggering by performing I/O then exiting so the process ref drops and bfq_put_queue frees bfqq before bic_set_bfqq; BFQ is commonly enabled (e.g. Android/desktops), so success does not depend on conditions outside attacker control.\nPR:L - Any unprivileged local user can open/write files on a BFQ-backed filesystem and exit; no capabilities or root are required along the exit_io_context → bfq_exit_icq path.\nUI:N - Exploitation needs only the attacker's own I/O and process exit; no victim action is required.\nS:U - This is a standard in-kernel heap UAF enabling privilege escalation within the same kernel security authority, not a VM/IOMMU/sandbox boundary cross.\nC:H - Use-after-free of struct bfq_queue lets an attacker reclaim and control the freed object, enabling arbitrary kernel memory disclosure primitives.\nI:H - bic_set_bfqq writes old_bfqq->bic on the freed object; with heap spray this yields a write primitive suitable for control-flow hijacking or arbitrary kernel modification.\nA:H - The UAF can oops/panic the kernel on access to freed bfqq memory even without full exploitation, so availability impact is high."
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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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"block/bfq-iosched.c"
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],
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"versions": [
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{
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"version": "5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a",
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"lessThan": "1425f1bb5df5239021fd09ebc2a5e8070e705d36",
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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": "094f3d9314d67691cb21ba091c1b528f6e3c4893",
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"lessThan": "7949b0df3dd9f4817ed4a4e989fa9ee81df6205f",
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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": "b22fd72bfebda3956efc4431b60ddfc0a51e03e0",
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"lessThan": "cfe5b38c37720313eff0dec5517442c7ab3c9a20",
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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": "761564d93c8265f65543acf0a576b32d66bfa26a",
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"lessThan": "1ed959fef5b1c6f1a7a3fbea543698c30ebd6678",
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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": "64dc8c732f5c2b406cc752e6aaa1bd5471159cab",
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"lessThan": "246cf66e300b76099b5dbd3fdd39e9a5dbc53f02",
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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": "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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"block/bfq-iosched.c"
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],
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"versions": [
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{
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"version": "5.15.86",
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"lessThan": "5.15.87",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.0.16",
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"lessThan": "6.0.17",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.1.2",
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"lessThan": "6.1.3",
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"status": "affected",
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"versionType": "semver"
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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": "5.15.86",
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"versionEndExcluding": "5.15.87"
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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": "6.0.16",
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"versionEndExcluding": "6.0.17"
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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": "6.1.2",
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"versionEndExcluding": "6.1.3"
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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/1425f1bb5df5239021fd09ebc2a5e8070e705d36"
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},
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{
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"url": "https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f"
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},
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{
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"url": "https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20"
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},
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{
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"url": "https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678"
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},
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{
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"url": "https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02"
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}
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],
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"title": "block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq",
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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-2022-50329",
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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": "2026-10-15T21:31:01.622731Z"
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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": "2026-10-15T21:31:20.243Z"
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}
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}
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]
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}
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} |