cvelist/2022/23xxx/CVE-2022-23035.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security@xen.org",
        "ID": "CVE-2022-23035",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "xen",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "?",
                                            "version_value": "consult Xen advisory XSA-395"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Xen"
                }
            ]
        }
    },
    "configuration": {
        "configuration_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "Xen versions 4.6 and later are vulnerable.  Xen versions 4.5 and earlier\nare not vulnerable.\n\nOnly x86 HVM guests with one or more passed-through physical devices\nusing (together) multiple physical interupts can leverage the\nvulnerability.  x86 PV guests cannot leverage the vulnerability.  x86\nHVM guests without passed-through devices or with a passed-through\ndevice using just a single physical interrupt also cannot leverage the\nvulnerability.  Device pass-through is unsupported for x86 PVH guests\nand all Arm guests."
                    }
                ]
            }
        }
    },
    "credit": {
        "credit_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "This issue was discovered by Julien Grall of Amazon."
                    }
                ]
            }
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Insufficient cleanup of passed-through device IRQs The management of IRQs associated with physical devices exposed to x86 HVM guests involves an iterative operation in particular when cleaning up after the guest's use of the device. In the case where an interrupt is not quiescent yet at the time this cleanup gets invoked, the cleanup attempt may be scheduled to be retried. When multiple interrupts are involved, this scheduling of a retry may get erroneously skipped. At the same time pointers may get cleared (resulting in a de-reference of NULL) and freed (resulting in a use-after-free), while other code would continue to assume them to be valid."
            }
        ]
    },
    "impact": {
        "impact_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "The precise impact is system specific, but would typically be a Denial\nof Service (DoS) affecting the entire host.  Privilege escalation and\ninformation leaks cannot be ruled out."
                    }
                ]
            }
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "unknown"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "url": "https://xenbits.xenproject.org/xsa/advisory-395.txt",
                "refsource": "MISC",
                "name": "https://xenbits.xenproject.org/xsa/advisory-395.txt"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20220125 Xen Security Advisory 395 v2 (CVE-2022-23035) - Insufficient cleanup of passed-through device IRQs",
                "url": "http://www.openwall.com/lists/oss-security/2022/01/25/4"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2022-0cc3916e08",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-5117",
                "url": "https://www.debian.org/security/2022/dsa-5117"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202208-23",
                "url": "https://security.gentoo.org/glsa/202208-23"
            }
        ]
    },
    "workaround": {
        "workaround_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "There is no mitigation (other than not passing through to x86 HVM guests\nPCI devices with, overall, more than a single physical interrupt)."
                    }
                ]
            }
        }
    }
}