193 lines
9.9 KiB
JSON
193 lines
9.9 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-2022-49905",
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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": "2025-05-01T14:05:17.246Z",
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"datePublished": "2025-05-01T14:10:49.621Z",
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"dateUpdated": "2026-10-15T21:31:17.447Z"
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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": "2026-08-05T08:56:38.460Z"
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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\nnet/smc: Fix possible leaked pernet namespace in smc_init()\n\nIn smc_init(), register_pernet_subsys(&smc_net_stat_ops) is called\nwithout any error handling.\nIf it fails, registering of &smc_net_ops won't be reverted.\nAnd if smc_nl_init() fails, &smc_net_stat_ops itself won't be reverted.\n\nThis leaves wild ops in subsystem linkedlist and when another module\ntries to call register_pernet_operations() it triggers page fault:\n\nBUG: unable to handle page fault for address: fffffbfff81b964c\nRIP: 0010:register_pernet_operations+0x1b9/0x5f0\nCall Trace:\n <TASK>\n register_pernet_subsys+0x29/0x40\n ebtables_init+0x58/0x1000 [ebtables]\n ..."
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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 bug is in smc_init() module/subsystem initialization and is reached via local actions such as socket(AF_SMC) module autoload (net-pf-43) or TCP_ULP \"smc\", not by processing remote packets.\nAC:L - An unprivileged local attacker can induce smc_init() failure (e.g., memory pressure on the many GFP_KERNEL allocations and registrations in the init path) and then trigger the dangling ops via netns creation or another pernet registration, without relying on conditions outside their control.\nPR:L - No CAP_SYS_MODULE is required: an unprivileged user can request_module via AF_SMC socket creation, and can create network namespaces through user namespaces to exercise the leaked pernet ops.\nUI:N - Exploitation requires no victim interaction; the attacker triggers module autoload and subsequent pernet list use themselves.\nS:U - Impact is confined to the host kernel authority (oops or privilege escalation within the same kernel); it does not cross a VM/host or other security boundary.\nC:H - Failed modular init frees the module while smc_net_ops or smc_net_stat_ops remain linked, yielding a use-after-free of pernet_operations (including function pointers) that can be reclaimed/sprayed for arbitrary kernel read primitives.\nI:H - The same dangling pernet_operations->init/exit pointers are invoked from setup_net()/register_pernet_operations(), so controlling the freed object enables arbitrary write and control-flow hijacking.\nA:H - The issue produces a kernel page fault/oops when another subsystem walks the corrupted pernet list (as shown with ebtables_init), which is a full availability impact."
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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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"net/smc/af_smc.c"
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],
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"versions": [
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{
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"version": "194730a9beb52d2b030ea45e12d94868d4a0e6fd",
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"lessThan": "61defd6450a9ef4a1487090449999b0fd83518ef",
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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": "194730a9beb52d2b030ea45e12d94868d4a0e6fd",
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"lessThan": "c97daf836f7caf81d3144b8cd2b2a51f9bc3bd09",
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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": "194730a9beb52d2b030ea45e12d94868d4a0e6fd",
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"lessThan": "62ff373da2534534c55debe6c724c7fe14adb97f",
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"status": "affected",
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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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"net/smc/af_smc.c"
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],
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"versions": [
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{
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"version": "5.14",
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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": "5.14",
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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": "5.15.78",
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"lessThanOrEqual": "5.15.*",
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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": "6.0.8",
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"lessThanOrEqual": "6.0.*",
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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": "6.1",
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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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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "5.15.78"
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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": "5.14",
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"versionEndExcluding": "6.0.8"
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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": "5.14",
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"versionEndExcluding": "6.1"
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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/61defd6450a9ef4a1487090449999b0fd83518ef"
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},
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{
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"url": "https://git.kernel.org/stable/c/c97daf836f7caf81d3144b8cd2b2a51f9bc3bd09"
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},
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{
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"url": "https://git.kernel.org/stable/c/62ff373da2534534c55debe6c724c7fe14adb97f"
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}
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],
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"title": "net/smc: Fix possible leaked pernet namespace in smc_init()",
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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-2022-49905",
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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": "2026-10-15T21:29:44.271140Z"
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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": "2026-10-15T21:31:17.447Z"
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}
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}
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}
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} |