310 lines
15 KiB
JSON
310 lines
15 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-2026-64380",
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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": "2026-07-19T15:36:31.784Z",
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"datePublished": "2026-07-25T08:50:30.476Z",
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"dateUpdated": "2026-10-19T20:38:25.851Z"
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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": "2026-08-17T04:54:31.740Z"
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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\nsmb: client: harden POSIX SID length parsing\n\nposix_info_sid_size() reads sid[1] to obtain the subauthority count,\nbut its existing boundary check still accepts buffers with only one\nremaining byte. Require two bytes before reading sid[1] so all client\npaths that reuse the helper reject truncated POSIX SIDs safely."
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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:L/I:N/A:H",
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"baseScore": 8.2,
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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:N - A malicious SMB server can deliver the truncated POSIX SID through SMB3.1.1 query-info or query-directory responses over TCP.\nAC:L - The server directly controls the response length and can deterministically leave exactly one SID byte remaining; no race or uncontrollable condition is required.\nPR:N - The malicious server needs no privileges on the vulnerable client, and guest-capable or attacker-controlled shares can supply the response after connection establishment.\nUI:N - On an already mounted POSIX-enabled share, routine automated stat, readdir, or metadata operations can trigger parsing without human interaction.\nS:U - The out-of-bounds access occurs within the client kernel and does not cross a virtualization, IOMMU, or other separate security authority boundary.\nC:L - The primitive reads exactly one byte beyond the response boundary, limiting any confidentiality effect to adjacent memory rather than providing an arbitrary-read primitive.\nI:N - The out-of-bounds byte only influences validation, which always rejects because a legal SID requires at least 12 bytes; no attacker-influenced copy or memory write follows.\nA:H - The server can place the truncated SID at the receive allocation boundary, where the out-of-bounds access can trigger a sanitizer fault or kernel oops and can be repeated to crash the client."
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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/smb/client/smb2pdu.c"
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],
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"versions": [
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{
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"version": "349e13ad30b45998bb9937cfe0b32be6f951976d",
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"lessThan": "171605aed68380c2fa75dff9b3a1ed427c50065b",
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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": "349e13ad30b45998bb9937cfe0b32be6f951976d",
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"lessThan": "4213c1208978483021d7d125c131de3985d38f61",
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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": "349e13ad30b45998bb9937cfe0b32be6f951976d",
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"lessThan": "96e889bc1e759c83f25093e8c2f3da31b4973f30",
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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": "349e13ad30b45998bb9937cfe0b32be6f951976d",
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"lessThan": "0de5b8e76847f5de26f364a82c6602c4881c30da",
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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": "349e13ad30b45998bb9937cfe0b32be6f951976d",
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"lessThan": "427eb7eb46425fec845a43e861f3d6e2899cae59",
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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": "349e13ad30b45998bb9937cfe0b32be6f951976d",
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"lessThan": "86c5d470f5d42e61123b2f4b4f0b91f4eee5b980",
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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": "349e13ad30b45998bb9937cfe0b32be6f951976d",
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"lessThan": "46a84715a015cb48e1b9c219dc88c03d8a541ea4",
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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": "349e13ad30b45998bb9937cfe0b32be6f951976d",
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"lessThan": "7ad2bcf2441430bb2e918fb3ef9a90d775a6e422",
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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/smb/client/smb2pdu.c"
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],
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"versions": [
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{
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"version": "5.7",
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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": "5.7",
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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": "5.10.261",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.212",
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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": "6.1.178",
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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": "6.6.145",
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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": "6.12.96",
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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": "6.18.39",
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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": "7.1.4",
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"lessThanOrEqual": "7.1.*",
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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": "7.2",
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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": "5.7",
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"versionEndExcluding": "5.10.261"
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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": "5.7",
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"versionEndExcluding": "5.15.212"
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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": "5.7",
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"versionEndExcluding": "6.1.178"
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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": "5.7",
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"versionEndExcluding": "6.6.145"
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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": "5.7",
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"versionEndExcluding": "6.12.96"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.7",
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"versionEndExcluding": "7.1.4"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/171605aed68380c2fa75dff9b3a1ed427c50065b"
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},
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{
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"url": "https://git.kernel.org/stable/c/4213c1208978483021d7d125c131de3985d38f61"
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},
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{
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"url": "https://git.kernel.org/stable/c/96e889bc1e759c83f25093e8c2f3da31b4973f30"
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},
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{
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"url": "https://git.kernel.org/stable/c/0de5b8e76847f5de26f364a82c6602c4881c30da"
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},
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{
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"url": "https://git.kernel.org/stable/c/427eb7eb46425fec845a43e861f3d6e2899cae59"
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},
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{
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"url": "https://git.kernel.org/stable/c/86c5d470f5d42e61123b2f4b4f0b91f4eee5b980"
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},
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{
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"url": "https://git.kernel.org/stable/c/46a84715a015cb48e1b9c219dc88c03d8a541ea4"
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},
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{
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"url": "https://git.kernel.org/stable/c/7ad2bcf2441430bb2e918fb3ef9a90d775a6e422"
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}
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],
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"title": "smb: client: harden POSIX SID length parsing",
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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-2026-64380",
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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": "yes"
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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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"version": "2.0.3",
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"timestamp": "2026-10-16T15:39:47.266663Z"
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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-125",
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"description": "CWE-125 Out-of-bounds Read"
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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": "2026-10-19T20:38:25.851Z"
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}
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}
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]
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}
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} |