268 lines
13 KiB
JSON
268 lines
13 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-2026-64076",
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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": "2026-07-19T07:54:57.031Z",
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"datePublished": "2026-07-19T15:39:50.346Z",
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"dateUpdated": "2026-10-30T12:27:33.060Z"
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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": "2026-10-30T12:27:33.060Z"
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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\nnetfilter: bridge: eb_tables: close module init race\n\nsashiko reports for unrelated patch:\n Does the core ebtables initialization in ebtables.c suffer from a similar race?\n Once nf_register_sockopt() completes, the sockopts are exposed globally.\n\nsockopt has to be registered last, just like in ip/ip6/arptables."
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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 - Exploitation requires a local setsockopt/getsockopt syscall on a PF_INET socket; the vulnerable ebtables handlers are reached via ip_setsockopt → nf_setsockopt, not via remote bridge frame or network packet processing.\nAC:L - The attacker can hammer concurrent setsockopt/getsockopt calls in a tight loop while waiting for or triggering ebtables module load, controlling the sockopt side of the init race window between nf_register_sockopt() and register_pernet_subsys().\nPR:L - All ebtables sockopt entry points (do_ebt_set_ctl/do_ebt_get_ctl) gate on ns_capable(net->user_ns, CAP_NET_ADMIN), which is obtainable by an unprivileged user via user namespaces (unshare -Urn).\nUI:N - No victim interaction is required; exploitation is fully attacker-driven through concurrent syscalls during module initialization.\nS:U - Impact is confined to kernel memory and integrity within the same security authority; this is not a VM escape, sandbox breakout, or cross-tenant boundary crossing.\nC:H - Before pernet registration, net_generic(net, 0) returns the net_generic.len field misinterpreted as a pointer, and list_for_each_entry on the resulting bogus ebt_pernet->tables can read unintended kernel memory before faulting.\nI:H - The same uninitialized net_generic lookup drives list traversal and subsequent ebtables table management paths (do_replace/do_update_counters) that perform kernel heap list operations and rule data writes against corrupted state.\nA:H - Hitting the race window causes invalid pointer dereference during list iteration, producing a kernel oops/panic and denying system availability."
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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/bridge/netfilter/ebtables.c"
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],
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"versions": [
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{
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"version": "5b53951cfc85329d29df9d07b1e905f4563546a5",
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"lessThan": "e0e7dec9dfc02987598e6a42bdfcab51dcc43e10",
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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": "5b53951cfc85329d29df9d07b1e905f4563546a5",
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"lessThan": "5fc488f46086d17e8e545d8104ddd95b175de218",
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"status": "affected",
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},
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"lessThan": "6bb35bdaabb22fd2d86b601904e928dbaa537941",
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"status": "affected",
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"lessThan": "c647e2a21bbbaceda6cdb8a44a56f44d231dc4b4",
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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": "5b53951cfc85329d29df9d07b1e905f4563546a5",
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"lessThan": "02d999dc69b3918dba2414932b5d95f1f75c76cb",
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"status": "affected",
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"versionType": "git"
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{
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"version": "5b53951cfc85329d29df9d07b1e905f4563546a5",
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"lessThan": "27414ff1b287ea9a2a11675149ec28e05539f3cc",
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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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"net/bridge/netfilter/ebtables.c"
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],
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"versions": [
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{
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"version": "5.13",
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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": "5.13",
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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": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.114",
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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": "6.18.34",
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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": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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": "5.13",
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"versionEndExcluding": "6.1.191"
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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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}
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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/e0e7dec9dfc02987598e6a42bdfcab51dcc43e10"
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},
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{
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"url": "https://git.kernel.org/stable/c/5fc488f46086d17e8e545d8104ddd95b175de218"
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},
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{
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"url": "https://git.kernel.org/stable/c/6bb35bdaabb22fd2d86b601904e928dbaa537941"
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},
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{
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"url": "https://git.kernel.org/stable/c/c647e2a21bbbaceda6cdb8a44a56f44d231dc4b4"
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},
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{
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"url": "https://git.kernel.org/stable/c/02d999dc69b3918dba2414932b5d95f1f75c76cb"
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},
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{
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"url": "https://git.kernel.org/stable/c/27414ff1b287ea9a2a11675149ec28e05539f3cc"
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}
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],
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"title": "netfilter: bridge: eb_tables: close module init race",
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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-2026-64076",
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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": "2026-10-16T15:36:08.204808Z"
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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-362",
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"description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"
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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": "2026-10-19T20:28:11.275Z"
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}
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}
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]
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}
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} |