fkie_cve-2023-34326
Vulnerability from fkie_nvd
Published
2024-01-05 17:15
Modified
2025-06-18 16:15
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
The caching invalidation guidelines from the AMD-Vi specification (48882—Rev 3.07-PUB—Oct 2022) is incorrect on some hardware, as devices will malfunction (see stale DMA mappings) if some fields of the DTE are updated but the IOMMU TLB is not flushed. Such stale DMA mappings can point to memory ranges not owned by the guest, thus allowing access to unindented memory regions.
References
security@xen.orghttps://xenbits.xenproject.org/xsa/advisory-442.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://xenbits.xenproject.org/xsa/advisory-442.htmlVendor Advisory
Impacted products
Vendor Product Version
xen xen *


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The caching invalidation guidelines from the AMD-Vi specification (48882\u2014Rev\n3.07-PUB\u2014Oct 2022) is incorrect on some hardware, as devices will malfunction\n(see stale DMA mappings) if some fields of the DTE are updated but the IOMMU\nTLB is not flushed.\n\nSuch stale DMA mappings can point to memory ranges not owned by the guest, thus\nallowing access to unindented memory regions.\n"
    },
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      "value": "Las pautas de invalidaci\u00f3n de almacenamiento en cach\u00e9 de la especificaci\u00f3n AMD-Vi (48882\u2014Rev 3.07-PUB\u2014octubre de 2022) son incorrectas en algunos hardware, ya que los dispositivos funcionar\u00e1n mal (consulte las asignaciones de DMA obsoletas) si algunos campos del DTE se actualizan pero el IOMMU TLB no est\u00e1 eliminado. Estas asignaciones de DMA obsoletas pueden apuntar a rangos de memoria que no pertenecen al hu\u00e9sped, lo que permite el acceso a regiones de memoria sin sangr\u00eda."
    }
  ],
  "id": "CVE-2023-34326",
  "lastModified": "2025-06-18T16:15:21.167",
  "metrics": {
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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  "published": "2024-01-05T17:15:08.637",
  "references": [
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      "source": "security@xen.org",
      "tags": [
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  "vulnStatus": "Modified",
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}


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