218 lines
10 KiB
JSON
218 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-2022-49362",
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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": "2025-02-26T02:08:31.547Z",
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"datePublished": "2025-02-26T02:11:09.344Z",
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"dateUpdated": "2026-08-05T08:54:54.470Z"
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},
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"containers": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:54:54.470Z"
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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\nNFSD: Fix potential use-after-free in nfsd_file_put()\n\nnfsd_file_put_noref() can free @nf, so don't dereference @nf\nimmediately upon return from nfsd_file_put_noref()."
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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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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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:N - The vulnerable nfsd_file_put() path runs in the in-kernel NFS server (fs/nfsd/filecache.c) on READ/WRITE/COMMIT and related ops, reached via RPC to nfsd over the network (TCP/UDP 2049); no local access is required.\nAC:L - The UAF is a race between nfsd_file_put() observing NFSD_FILE_HASHED and a concurrent unhash (e.g. REMOVE → fsnotify → nfsd_file_close_inode) that drops the hash ref so put_noref frees @nf; a remote client controls both sides via concurrent NFS requests on multiple nfsd threads.\nPR:N - Typical nfsd deployments allow AUTH_SYS/AUTH_NULL with IP-based exports, so a remote peer that can reach the export self-asserts credentials with no cryptographic authentication and can exercise the filecache put path.\nUI:N - Exploitation requires only attacker-sent NFS protocol operations; no action by a victim user or administrator on the server is needed.\nS:U - The use-after-free corrupts kernel memory within the host nfsd authority and does not cross a VM, IOMMU, or other separate security boundary.\nC:H - This is a use-after-free of a slab-allocated nfsd_file object; UAF enables reuse/spray of the freed object and can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same nfsd_file use-after-free enables heap spraying and corruption of the reallocated object, yielding write/control-flow hijack primitives in the NFS server kernel.\nA:H - Use-after-free of nfsd_file can cause kernel oops/panic or memory corruption crashes in nfsd threads, fully disrupting availability of the NFS server host."
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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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"fs/nfsd/filecache.c"
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],
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"versions": [
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{
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"version": "9862064ca81f9b9da8ebe26c86cf2b10c293ba1a",
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"lessThan": "ada1757b259f353cade47037ee0a0249b4cddad3",
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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": "a98e5b3d958ac697aafb3d077eb2cca4a731b7ee",
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"lessThan": "261eabe19cb28e4a8587a4442d257b543d7c2d57",
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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": "999397926ab3f78c7d1235cc4ca6e3c89d2769bf",
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"lessThan": "333dcc94ebf53f79f3dc0e7a7c16700bc7ff7e57",
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"status": "affected",
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{
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"version": "999397926ab3f78c7d1235cc4ca6e3c89d2769bf",
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"lessThan": "b6c71c66b0ad8f2b59d9bc08c7a5079b110bec01",
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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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"fs/nfsd/filecache.c"
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],
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"versions": [
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{
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"version": "5.18",
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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": "5.18",
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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": "5.18.4",
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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": "5.18",
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"versionEndExcluding": "5.18.4"
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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": "5.18",
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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/ada1757b259f353cade47037ee0a0249b4cddad3"
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},
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{
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"url": "https://git.kernel.org/stable/c/261eabe19cb28e4a8587a4442d257b543d7c2d57"
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},
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{
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"url": "https://git.kernel.org/stable/c/333dcc94ebf53f79f3dc0e7a7c16700bc7ff7e57"
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},
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{
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"url": "https://git.kernel.org/stable/c/b6c71c66b0ad8f2b59d9bc08c7a5079b110bec01"
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}
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],
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"title": "NFSD: Fix potential use-after-free in nfsd_file_put()",
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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-2022-49362",
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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": "2025-02-27T18:16:34.174132Z"
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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": "2025-02-27T18:22:33.669Z"
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}
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}
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]
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}
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} |