578 lines
27 KiB
JSON
578 lines
27 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2026-46174",
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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": "2026-05-13T15:03:33.103Z",
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"datePublished": "2026-05-28T09:36:28.703Z",
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"dateUpdated": "2026-11-10T12:47:23.454Z"
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"dateUpdated": "2026-08-05T12:30:12.168Z"
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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\nx86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache\n\nMake sure resources are not improperly shared in the op cache and\ncause instruction corruption this way."
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"baseScore": 8.8,
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"lang": "en",
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"value": "AV:L - The flaw is in the CPU's op cache and requires executing instructions on the affected core to drive improper resource sharing; it is not reachable over a network. Triggering it needs local code execution on the machine.\nAC:L - An attacker who can co-schedule code on SMT siblings of an affected Zen2 core controls both sides of the shared op-cache contention and can reliably drive the improper-isolation condition. Following the higher-severity rule, this is Low.\nPR:L - Triggering the op-cache resource sharing only requires the ability to run code (an unprivileged local user or a guest VM tenant); no root or admin capability is needed. It does, however, require at least some local execution access, so not None.\nUI:N - The attacker's own executing code populates and contends for the op cache; no victim action is required.\nS:C - The bug is an isolation failure of a microarchitectural resource shared across SMT threads, so instruction corruption can cross from the attacker's context into a different security authority (another VM/tenant or the host kernel), impacting resources beyond the attacking component's scope.\nC:H - Improper isolation of a shared op-cache resource is an information-disclosure vector across contexts, and the resulting instruction corruption can be leveraged to read memory belonging to another security domain.\nI:H - The defining impact is \"instruction corruption\" — the CPU executes corrupted/wrong instructions in a victim context, which is a direct, severe integrity violation enabling control-flow and data corruption across the isolation boundary.\nA:H - Instruction corruption causes incorrect execution, crashes, and hangs in the affected (potentially cross-context) code, resulting in high availability impact."
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|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.6",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.5",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.7",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-46174",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T15:20:43.490528Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"cweId": "CWE-862",
|
|
"description": "CWE-862 Missing Authorization"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-19T19:36:53.596Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |