FKIE_CVE-2022-42327

Vulnerability from fkie_nvd - Published: 2022-11-01 13:15 - Updated: 2025-05-05 20:15
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Summary
x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.
References
security@xen.orghttp://www.openwall.com/lists/oss-security/2022/11/01/3Mailing List, Patch, Third Party Advisory
security@xen.orghttp://xenbits.xen.org/xsa/advisory-412.htmlPatch, Vendor Advisory
security@xen.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
security@xen.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
security@xen.orghttps://security.gentoo.org/glsa/202402-07
security@xen.orghttps://xenbits.xenproject.org/xsa/advisory-412.txtVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2022/11/01/3Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://xenbits.xen.org/xsa/advisory-412.htmlPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202402-07
af854a3a-2127-422b-91ae-364da2661108https://xenbits.xenproject.org/xsa/advisory-412.txtVendor Advisory
Impacted products
Vendor Product Version
xen xen 4.16
fedoraproject fedora 36
fedoraproject fedora 37
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests."
    },
    {
      "lang": "es",
      "value": "x86: intercambio de memoria no deseado entre invitados En los sistemas Intel que admiten la funci\u00f3n \"virtualizar accesos APIC\", un invitado puede leer y escribir la p\u00e1gina xAPIC compartida global sacando el APIC local del modo xAPIC. El acceso a esta p\u00e1gina compartida evita el aislamiento esperado que deber\u00eda existir entre dos invitados."
    }
  ],
  "id": "CVE-2022-42327",
  "lastModified": "2025-05-05T20:15:18.900",
  "metrics": {
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  "sourceIdentifier": "security@xen.org",
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}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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