312 lines
15 KiB
JSON
312 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-2024-35865",
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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": "2024-05-17T13:50:33.107Z",
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"datePublished": "2024-05-19T08:34:23.853Z",
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"dateUpdated": "2026-08-05T11:30:29.384Z"
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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": "2026-08-05T11:30:29.384Z"
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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: fix potential UAF in smb2_is_valid_oplock_break()\n\nSkip sessions that are being teared down (status == SES_EXITING) to\navoid UAF."
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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 function is invoked directly by the CIFS client's demultiplex thread on unsolicited SMB2 frames received from the remote server over TCP/445, with no signature verification and no SessionId validation on that path. A malicious/compromised SMB server or an attacker able to inject into the established TCP stream reaches it remotely.\nAC:L - The attacker controls both sides of the race: it can induce session teardown (DFS referral churn, failed session setup/tree connect, multiuser tlink expiry) and then hold the session in SES_EXITING for up to the ~180 s SMB response timeout by simply withholding the SMB2 LOGOFF reply, while flooding OPLOCK_BREAK frames into that window. The resulting window is enormous and entirely attacker-timed.\nPR:N - The remote peer needs no credentials or privileges on the victim client; the oplock-break handler runs before any MID match, signature check, or SessionId validation, so even an unauthenticated packet injector on the connection triggers it.\nUI:N - Against a client with an existing SMB mount, no victim action is required — the malicious server or MITM drives both the teardown and the oplock-break frames on its own. The mount is pre-existing system configuration, not an in-attack user action.\nS:U - The use-after-free corrupts kernel heap objects within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - A use-after-free on session/tcon-reachable objects lets the attacker reclaim the freed slab object and steer the list traversal into attacker-influenced data, disclosing kernel memory and kernel pointers.\nI:H - The handler writes remote-controlled values (rsp->OplockLevel, oplock_epoch, PENDING_OPLOCK_BREAK bit) into the object it locates and then does cifsFileInfo_get() plus queue_work() on it, giving refcount-manipulation and workqueue-dispatch primitives on freed memory that are leverageable for control-flow hijack.\nA:H - Use-after-free in the demultiplex thread reliably produces kernel oops/panic, taking down the whole system even when full exploitation is not achieved."
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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/smb2misc.c"
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],
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"versions": [
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{
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"version": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
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"lessThan": "a710ef9e974f18232d2b9b19c90eda1a1167b2d4",
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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": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
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"lessThan": "84488466b7a69570bdbf76dd9576847ab97d54e7",
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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": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
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"lessThan": "21fed37d2bdcde33453faf61d3d4d96c355f04bd",
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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": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
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"lessThan": "3dba0e5276f131e36d6d8043191d856f49238628",
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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": "7f48558e6489d032b1584b0cc9ac4bb11072c034",
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"lessThan": "22863485a4626ec6ecf297f4cc0aef709bc862e4",
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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": "a67172a013953664b1dad03c648200c70b90506c",
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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": "3.12.48",
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"lessThan": "3.13",
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"status": "affected",
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"versionType": "semver"
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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/smb2misc.c"
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],
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"versions": [
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{
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"version": "3.13",
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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": "3.13",
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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": "5.15.209",
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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": "6.1.85",
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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": "6.6.26",
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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": "6.8.5",
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"lessThanOrEqual": "6.8.*",
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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": "6.9",
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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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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.13",
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"versionEndExcluding": "5.15.209"
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/a710ef9e974f18232d2b9b19c90eda1a1167b2d4"
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},
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{
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"url": "https://git.kernel.org/stable/c/84488466b7a69570bdbf76dd9576847ab97d54e7"
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},
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{
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"url": "https://git.kernel.org/stable/c/21fed37d2bdcde33453faf61d3d4d96c355f04bd"
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},
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{
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"url": "https://git.kernel.org/stable/c/3dba0e5276f131e36d6d8043191d856f49238628"
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},
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{
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"url": "https://git.kernel.org/stable/c/22863485a4626ec6ecf297f4cc0aef709bc862e4"
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}
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],
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"title": "smb: client: fix potential UAF in smb2_is_valid_oplock_break()",
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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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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"lang": "en",
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"description": "CWE-noinfo Not enough information"
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}
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]
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}
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],
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"metrics": [
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{
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 5.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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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": "NONE"
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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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"timestamp": "2024-06-18T16:57:58.906769Z",
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"id": "CVE-2024-35865",
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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": "2024-11-01T15:44:35.957Z"
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}
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{
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"shortName": "CVE",
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"dateUpdated": "2024-08-02T03:21:48.469Z"
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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/84488466b7a69570bdbf76dd9576847ab97d54e7",
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} |