193 lines
10 KiB
JSON
193 lines
10 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-2025-38270",
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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": "2025-04-16T04:51:23.998Z",
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"datePublished": "2025-07-10T07:41:52.475Z",
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"dateUpdated": "2026-10-15T21:52:13.251Z"
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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": "2026-08-05T12:00:52.836Z"
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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: drv: netdevsim: don't napi_complete() from netpoll\n\nnetdevsim supports netpoll. Make sure we don't call napi_complete()\nfrom it, since it may not be scheduled. Breno reports hitting a\nwarning in napi_complete_done():\n\nWARNING: CPU: 14 PID: 104 at net/core/dev.c:6592 napi_complete_done+0x2cc/0x560\n __napi_poll+0x2d8/0x3a0\n handle_softirqs+0x1fe/0x710\n\nThis is presumably after netpoll stole the SCHED bit prematurely."
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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 - netdevsim is a purely software-simulated netdev with no physical link; the vulnerable `nsim_poll()` is reached by transmitting on a local netdevsim interface (`nsim_start_xmit` → `nsim_napi_rx` → `napi_schedule`) or via a locally configured netconsole/netpoll. There is no path from unsolicited remote traffic in a default configuration.\nAC:L - The attacker fully controls both the trigger and the race: queuing ≥64 skbs on one RX ring makes `nsim_rcv()` return the full budget deterministically, and concurrent `napi_schedule()` from a second thread on another CPU is trivially arranged by multi-threaded sending. No condition depends on state outside the attacker's influence.\nPR:L - Given a netdevsim interface present in the attacker's network namespace (a routine setup on CI/test hosts and in admin-provisioned containers), an ordinary unprivileged local user can drive the RX ring to full budget simply by sending packets — no capability check guards `nsim_start_xmit()` or the NAPI poll path.\nUI:N - The condition is triggered entirely by the attacker's own packet transmission and softirq NAPI processing; no victim action of any kind is needed.\nS:U - The corrupted state (NAPI `state` bits, `poll_list`, GRO lists) and the resulting impact are all within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Clearing `NAPIF_STATE_SCHED` while still owning the instance destroys NAPI's only mutual-exclusion guarantee (netpoll_poll_lock is a no-op without netpoll), allowing two CPUs to run the same NAPI concurrently over shared `napi->gro` and skb lists; the resulting list corruption/UAF is leverageable to read adjacent kernel memory.\nI:H - A `list_add_tail()` of an already-linked `poll_list` node onto a second CPU's poll list is an unlinked-pointer write into kernel list structures, and concurrent GRO/skb-queue manipulation yields further heap corruption — both classic primitives for controlled kernel memory writes.\nA:H - The reported symptom is a `WARN_ON_ONCE` in `napi_complete_done()` (fatal under `panic_on_warn`), and the NAPI-state desync additionally causes list corruption, `pr_crit` under `CONFIG_DEBUG_NET`, softirq loops, and oopses that take down the machine."
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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/net/netdevsim/netdev.c"
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],
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"versions": [
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{
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"version": "3762ec05a9fbda16aaaa2568df679ab8ad13f38d",
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"lessThan": "a8ff2e362d901200a1075c3ca9c56d9c7bbef389",
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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": "3762ec05a9fbda16aaaa2568df679ab8ad13f38d",
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"lessThan": "6837dd877270c57689bd866de9f3de14172c2439",
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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": "3762ec05a9fbda16aaaa2568df679ab8ad13f38d",
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"lessThan": "1264971017b4d7141352a7fe29021bdfce5d885d",
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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/net/netdevsim/netdev.c"
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],
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"versions": [
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{
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"version": "6.10",
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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": "6.10",
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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": "6.12.34",
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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": "6.15.3",
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"lessThanOrEqual": "6.15.*",
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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": "6.16",
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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": "6.10",
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"versionEndExcluding": "6.12.34"
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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": "6.10",
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"versionEndExcluding": "6.15.3"
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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": "6.10",
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"versionEndExcluding": "6.16"
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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/a8ff2e362d901200a1075c3ca9c56d9c7bbef389"
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},
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{
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"url": "https://git.kernel.org/stable/c/6837dd877270c57689bd866de9f3de14172c2439"
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},
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{
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"url": "https://git.kernel.org/stable/c/1264971017b4d7141352a7fe29021bdfce5d885d"
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}
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],
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"title": "net: drv: netdevsim: don't napi_complete() from netpoll",
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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-2025-38270",
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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": "2026-10-15T21:49:13.510356Z"
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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": "2026-10-15T21:52:13.251Z"
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}
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}
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]
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}
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} |