{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2020-29569",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "n/a"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "url": "https://xenbits.xenproject.org/xsa/advisory-350.html",
                "refsource": "MISC",
                "name": "https://xenbits.xenproject.org/xsa/advisory-350.html"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-4843",
                "url": "https://www.debian.org/security/2021/dsa-4843"
            },
            {
                "refsource": "CONFIRM",
                "name": "https://security.netapp.com/advisory/ntap-20210205-0001/",
                "url": "https://security.netapp.com/advisory/ntap-20210205-0001/"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update",
                "url": "https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update",
                "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202107-30",
                "url": "https://security.gentoo.org/glsa/202107-30"
            }
        ]
    }
}