242 lines
12 KiB
JSON
242 lines
12 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-2022-49426",
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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": "2025-02-26T02:08:31.569Z",
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"datePublished": "2025-02-26T02:12:47.206Z",
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"dateUpdated": "2026-08-05T08:55:11.768Z"
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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": "2026-08-05T08:55:11.768Z"
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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\niommu/arm-smmu-v3-sva: Fix mm use-after-free\n\nWe currently call arm64_mm_context_put() without holding a reference to\nthe mm, which can result in use-after-free. Call mmgrab()/mmdrop() to\nensure the mm only gets freed after we unpinned the ASID."
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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 reached only via local SVA bind/unbind on ARM SMMUv3, typically through open/close of a uacce char device (iommu_sva_bind_device → arm_smmu_sva_bind → arm_smmu_alloc_shared_cd / free_shared_cd), not via network packet processing.\nAC:L - An attacker who can open the accelerator device fully controls bind and unbind (open/close or process exit), directly driving the missing-mmgrab UAF path; per kernel UAF guidance this is Low complexity.\nPR:L - No capability check exists on the uacce open path; UACCE is explicitly a user-space accelerator interface, so a normal local user with device-node access (common on HiSilicon/WarpDrive deployments) can trigger the bug without real root.\nUI:N - The attacker triggers the vulnerability themselves by binding and later unbinding SVA; no separate victim action is required.\nS:U - This is a kernel mm_struct use-after-free enabling host privilege escalation within the same OS security authority, not a guest-to-host escape or a direct IOMMU/DMA isolation bypass.\nC:H - Use-after-free of mm_struct while unpinning the ASID lets the attacker reclaim and control the freed object, enabling arbitrary kernel read primitives.\nI:H - The same UAF is exploitable for heap manipulation and arbitrary write / control-flow hijacking in the kernel.\nA:H - Dereferencing the freed mm in arm64_mm_context_put can oops/panic the kernel 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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"drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c"
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],
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"versions": [
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{
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"version": "32784a9562fb0518b12e9797ee2aec52214adf6f",
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"lessThan": "fc90f13ea0dcd960e5002d204fa55cec4e0db2fa",
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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": "32784a9562fb0518b12e9797ee2aec52214adf6f",
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"lessThan": "e3cbbdbff8a4db5d053c53fd71be62ccccdb52b0",
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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": "32784a9562fb0518b12e9797ee2aec52214adf6f",
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"lessThan": "9aa215450888cf29af0c479e14a712dc6b0c506c",
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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": "32784a9562fb0518b12e9797ee2aec52214adf6f",
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"lessThan": "cbd23144f7662b00bcde32a938c4a4057e476d68",
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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/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c"
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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": "5.15.46",
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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": "5.17.14",
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"lessThanOrEqual": "5.17.*",
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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": "5.18.3",
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"lessThanOrEqual": "5.18.*",
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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": "5.19",
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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": "5.15.46"
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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": "5.17.14"
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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": "5.18.3"
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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": "5.11",
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"versionEndExcluding": "5.19"
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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/fc90f13ea0dcd960e5002d204fa55cec4e0db2fa"
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},
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{
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"url": "https://git.kernel.org/stable/c/e3cbbdbff8a4db5d053c53fd71be62ccccdb52b0"
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},
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{
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"url": "https://git.kernel.org/stable/c/9aa215450888cf29af0c479e14a712dc6b0c506c"
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},
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{
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"url": "https://git.kernel.org/stable/c/cbd23144f7662b00bcde32a938c4a4057e476d68"
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}
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],
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"title": "iommu/arm-smmu-v3-sva: Fix mm use-after-free",
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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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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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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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-2022-49426",
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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": "2025-02-27T18:16:10.824439Z"
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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-416",
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"description": "CWE-416 Use After Free"
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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": "2025-02-27T18:22:32.946Z"
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}
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}
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]
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}
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} |