{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "state": "PUBLISHED",
        "cveId": "CVE-2021-28706",
        "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "assignerShortName": "XEN",
        "dateUpdated": "2024-08-03T21:47:33.187Z",
        "dateReserved": "2021-03-18T00:00:00.000Z",
        "datePublished": "2021-11-24T00:00:00.000Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
                "shortName": "XEN",
                "dateUpdated": "2024-02-04T08:06:49.398Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound."
                }
            ],
            "affected": [
                {
                    "vendor": "Xen",
                    "product": "xen",
                    "versions": [
                        {
                            "version": "4.12.x",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "Xen",
                    "product": "xen",
                    "versions": [
                        {
                            "version": "unspecified",
                            "lessThan": "4.12",
                            "status": "unknown",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.14.x",
                            "status": "affected",
                            "lessThan": "unspecified",
                            "versionType": "custom"
                        },
                        {
                            "version": "next of 4.15.x",
                            "status": "unaffected",
                            "lessThan": "unspecified",
                            "versionType": "custom"
                        }
                    ]
                },
                {
                    "vendor": "Xen",
                    "product": "xen",
                    "versions": [
                        {
                            "version": "xen-unstable",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "Xen",
                    "product": "xen",
                    "versions": [
                        {
                            "version": "4.13.x",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://xenbits.xenproject.org/xsa/advisory-385.txt"
                },
                {
                    "name": "FEDORA-2021-03645e9807",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/"
                },
                {
                    "name": "DSA-5017",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://www.debian.org/security/2021/dsa-5017"
                },
                {
                    "name": "FEDORA-2021-2b3a2de94f",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/"
                },
                {
                    "name": "GLSA-202402-07",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://security.gentoo.org/glsa/202402-07"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Julien Grall of Amazon.'}]}}}"
                }
            ],
            "metrics": [
                {
                    "other": {
                        "type": "unknown",
                        "content": {
                            "description": {
                                "description_data": [
                                    {
                                        "lang": "eng",
                                        "value": "A guest may be able too allocate unbounded amounts of memory to itself.\nThis may result in a Denial of Service (DoS) affecting the entire host."
                                    }
                                ]
                            }
                        }
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "text",
                            "lang": "en",
                            "description": "unknown"
                        }
                    ]
                }
            ]
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-03T21:47:33.187Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://xenbits.xenproject.org/xsa/advisory-385.txt",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "name": "FEDORA-2021-03645e9807",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7ZGWVVRI4XY2XSTBI3XEMWBXPDVX6OT/"
                    },
                    {
                        "name": "DSA-5017",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://www.debian.org/security/2021/dsa-5017"
                    },
                    {
                        "name": "FEDORA-2021-2b3a2de94f",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PXUI4VMD52CH3T7YXAG3J2JW7ZNN3SXF/"
                    },
                    {
                        "name": "GLSA-202402-07",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://security.gentoo.org/glsa/202402-07"
                    }
                ]
            }
        ]
    }
}