237 lines
12 KiB
JSON
237 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-2025-22042",
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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": "2024-12-29T08:45:45.809Z",
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"datePublished": "2025-04-16T14:12:03.896Z",
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"dateUpdated": "2026-08-05T11:56:15.350Z"
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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": "2026-08-05T11:56:15.350Z"
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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\nksmbd: add bounds check for create lease context\n\nAdd missing bounds check for create lease context."
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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:L/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 8.1,
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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 - The bug is in ksmbd, the in-kernel SMB server, and is triggered purely by a malformed SMB2 CREATE request with a crafted \"RqLs\" create context arriving over TCP/445. No local access is needed.\nAC:L - A single deterministically crafted request (DataOffset=0, DataLength=0, CreateContextsLength=20) passes smb2_find_context_vals() and reaches the fixed-offset read every time; there is no race, no timing window, and no dependence on memory layout for the disclosure.\nPR:L - SMB2_CREATE is dispatched only after a valid SessionId (ksmbd_session_lookup) and tree connect, so the attacker needs SMB credentials — though a guest-mapped share reduces this to effectively none.\nUI:N - The attacker triggers the flaw entirely by sending packets to the listening ksmbd service; no action by any local user or administrator is required.\nS:U - The out-of-bounds read stays within the kernel's own heap and the impact is confined to the kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to 36 bytes of adjacent kernel heap memory are read, and the first 16 (the lease key) are echoed verbatim to the remote attacker in the CREATE response via create_lease_buf(), giving a repeatable heap-disclosure oracle with attacker-controlled allocation sizing for grooming — sufficient to defeat KASLR and leak neighbouring object contents.\nI:N - The flaw is a read-only over-read; the memcpy destinations are correctly sized kzalloc'd objects and no attacker-controlled out-of-bounds write or control-flow corruption occurs.\nA:H - Because the attacker sizes the kvmalloc'd request buffer, the read can be positioned to run off the end of a vmalloc-backed allocation into a guard page, and on KASAN/hardened kernels it triggers an oops/panic, taking down the SMB server and potentially the system."
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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/server/oplock.c"
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],
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"versions": [
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{
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"version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "629dd37acc336ad778979361c351e782053ea284",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "60b7207893a8a06c78441934931a08fdad63f18e",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "800c482c9ef5910f05e3a713943c67cc6c1d4939",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "a41cd52f00907a040ca22c73d4805bb79b0d0972",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "9a1b6ea955e6c7b29939a6d98701202f9d9644ec",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "bab703ed8472aa9d109c5f8c1863921533363dae",
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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/server/oplock.c"
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],
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"versions": [
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{
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"version": "5.15",
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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": "5.15",
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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": "6.1.134",
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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": "6.6.87",
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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": "6.12.23",
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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": "6.13.11",
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"lessThanOrEqual": "6.13.*",
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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": "6.14.2",
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"lessThanOrEqual": "6.14.*",
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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": "6.15",
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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": "5.15",
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"versionEndExcluding": "6.1.134"
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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": "5.15",
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"versionEndExcluding": "6.6.87"
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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": "5.15",
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"versionEndExcluding": "6.12.23"
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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": "5.15",
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"versionEndExcluding": "6.13.11"
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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": "5.15",
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"versionEndExcluding": "6.14.2"
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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": "5.15",
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"versionEndExcluding": "6.15"
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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/629dd37acc336ad778979361c351e782053ea284"
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},
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{
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"url": "https://git.kernel.org/stable/c/60b7207893a8a06c78441934931a08fdad63f18e"
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},
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{
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"url": "https://git.kernel.org/stable/c/800c482c9ef5910f05e3a713943c67cc6c1d4939"
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},
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{
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"url": "https://git.kernel.org/stable/c/a41cd52f00907a040ca22c73d4805bb79b0d0972"
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},
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{
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"url": "https://git.kernel.org/stable/c/9a1b6ea955e6c7b29939a6d98701202f9d9644ec"
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},
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{
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"url": "https://git.kernel.org/stable/c/bab703ed8472aa9d109c5f8c1863921533363dae"
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}
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],
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"title": "ksmbd: add bounds check for create lease context",
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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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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T19:41:24.487Z"
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}
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}
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]
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}
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} |