221 lines
11 KiB
JSON
221 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-2022-48727",
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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": "2024-06-20T11:09:39.052Z",
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"datePublished": "2024-06-20T11:13:16.668Z",
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"dateUpdated": "2026-08-05T08:51:59.189Z"
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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": "2026-08-05T08:51:59.189Z"
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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\nKVM: arm64: Avoid consuming a stale esr value when SError occur\n\nWhen any exception other than an IRQ occurs, the CPU updates the ESR_EL2\nregister with the exception syndrome. An SError may also become pending,\nand will be synchronised by KVM. KVM notes the exception type, and whether\nan SError was synchronised in exit_code.\n\nWhen an exception other than an IRQ occurs, fixup_guest_exit() updates\nvcpu->arch.fault.esr_el2 from the hardware register. When an SError was\nsynchronised, the vcpu esr value is used to determine if the exception\nwas due to an HVC. If so, ELR_EL2 is moved back one instruction. This\nis so that KVM can process the SError first, and re-execute the HVC if\nthe guest survives the SError.\n\nBut if an IRQ synchronises an SError, the vcpu's esr value is stale.\nIf the previous non-IRQ exception was an HVC, KVM will corrupt ELR_EL2,\ncausing an unrelated guest instruction to be executed twice.\n\nCheck ARM_EXCEPTION_CODE() before messing with ELR_EL2, IRQs don't\nupdate this register so don't need to check."
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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:C/C:N/I:L/A:H",
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"baseScore": 7.3,
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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 KVM arm64 hyp `fixup_guest_exit()` during a guest exit; it is reached only by running an arm64 KVM guest (or locally via /dev/kvm), not by network packet processing or physical device attachment.\nAC:L - A guest can poison `vcpu->arch.fault.esr_el2` with HVC, IRQs occur routinely, and on worst-case arm64 deployments (assigned devices/RAS) the guest can induce a pending SError that is synchronized on IRQ exit—no attacker-uncontrollable lottery beyond that.\nPR:L - Triggering needs only the ability to run guest code under KVM; /dev/kvm is typically reachable by an unprivileged kvm-group user, and a cloud/Android tenant guest needs no host CAP_SYS_ADMIN.\nUI:N - The attacker drives guest HVC activity and the SError/IRQ exit path themselves; no separate victim action such as mounting a filesystem is required.\nS:C - The defect is in the host hypervisor, but the corrupted resource is guest ELR/PC saved into `ctxt->regs.pc`, so impact lands in the guest OS—a distinct security authority (same pattern as CVE-2025-21839).\nC:N - The bug only subtracts 4 from guest ELR when a stale ESR looks like HVC; it does not disclose host or cross-VM memory and provides no read primitive.\nI:L - KVM corrupts guest control flow by re-executing one unrelated instruction (PC-=4), which can alter guest state, but the modification is confined to that single rollback and is not an arbitrary write or host memory corruption.\nA:H - Resuming the guest at the wrong PC after SError handling can crash, hang, or permanently mis-execute the guest workload, fully denying availability of that VM."
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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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"arch/arm64/kvm/hyp/include/hyp/switch.h"
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],
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"versions": [
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{
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"version": "defe21f49bc98b095300752aa1e19bb608f3e97d",
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"lessThan": "e1e852746997500f1873f60b954da5f02cc2dba3",
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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": "defe21f49bc98b095300752aa1e19bb608f3e97d",
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"lessThan": "57e2986c3b25092691a6e3d6ee9168caf8978932",
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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": "defe21f49bc98b095300752aa1e19bb608f3e97d",
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"lessThan": "1c71dbc8a179d99dd9bb7e7fc1888db613cf85de",
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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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"arch/arm64/kvm/hyp/include/hyp/switch.h"
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],
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"versions": [
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{
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"version": "5.11",
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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": "5.11",
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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": "5.15.22",
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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": "5.16.8",
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"lessThanOrEqual": "5.16.*",
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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": "5.17",
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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": "5.11",
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"versionEndExcluding": "5.15.22"
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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": "5.11",
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"versionEndExcluding": "5.16.8"
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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": "5.11",
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"versionEndExcluding": "5.17"
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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/e1e852746997500f1873f60b954da5f02cc2dba3"
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},
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{
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"url": "https://git.kernel.org/stable/c/57e2986c3b25092691a6e3d6ee9168caf8978932"
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},
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{
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"url": "https://git.kernel.org/stable/c/1c71dbc8a179d99dd9bb7e7fc1888db613cf85de"
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}
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],
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"title": "KVM: arm64: Avoid consuming a stale esr value when SError occur",
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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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"timestamp": "2024-06-20T16:20:44.710184Z",
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"id": "CVE-2022-48727",
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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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"role": "CISA Coordinator",
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"version": "2.0.3"
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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": "2024-06-20T16:20:53.835Z"
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}
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},
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{
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"providerMetadata": {
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"shortName": "CVE",
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"dateUpdated": "2024-08-03T15:24:59.975Z"
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},
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/e1e852746997500f1873f60b954da5f02cc2dba3",
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"tags": [
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{
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} |