CVE-2023-46837 (GCVE-0-2023-46837)
Vulnerability from cvelistv5
Published
2024-01-05 16:36
Modified
2025-11-04 18:18
Summary
Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory. This undefined behavior was meant to be addressed by XSA-437, but the approach was not sufficient.
Impacted products
Show details on NVD website


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    "adp": [
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        "providerMetadata": {
          "dateUpdated": "2025-11-04T18:18:50.284Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-447.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XLL6SQ6IKFYXLYWITYZCRV5IBRK5G35R/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JFVKWYQFRUU3CAS53THTUKXEOUDWI42G/"
          },
          {
            "url": "http://xenbits.xen.org/xsa/advisory-447.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "NONE",
              "baseScore": 3.3,
              "baseSeverity": "LOW",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2023-46837",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-02-01T20:11:12.746031Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-119",
                "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-16T19:35:47.025Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Xen",
          "vendor": "Xen",
          "versions": [
            {
              "status": "unknown",
              "version": "consult Xen advisory XSA-447"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "Systems running all version of Xen are affected.\n\nOnly systems running Xen on Arm 32-bit are vulnerable.  Xen on Arm 64-bit\nis not affected."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "This issue was discovered by Michal Orzel from AMD."
        }
      ],
      "datePublic": "2023-12-12T12:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Arm provides multiple helpers to clean \u0026 invalidate the cache\nfor a given region.  This is, for instance, used when allocating\nguest memory to ensure any writes (such as the ones during scrubbing)\nhave reached memory before handing over the page to a guest.\n\nUnfortunately, the arithmetics in the helpers can overflow and would\nthen result to skip the cache cleaning/invalidation.  Therefore there\nis no guarantee when all the writes will reach the memory.\n\nThis undefined behavior was meant to be addressed by XSA-437, but the\napproach was not sufficient."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "A malicious guest may be able to read sensitive data from memory that\npreviously belonged to another guest."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-02-15T02:05:59.441Z",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "url": "https://xenbits.xenproject.org/xsa/advisory-447.html"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XLL6SQ6IKFYXLYWITYZCRV5IBRK5G35R/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JFVKWYQFRUU3CAS53THTUKXEOUDWI42G/"
        }
      ],
      "title": "arm32: The cache may not be properly cleaned/invalidated (take two)",
      "workarounds": [
        {
          "lang": "en",
          "value": "There is no known mitigation."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2023-46837",
    "datePublished": "2024-01-05T16:36:10.881Z",
    "dateReserved": "2023-10-27T07:55:35.332Z",
    "dateUpdated": "2025-11-04T18:18:50.284Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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