{"api_version":"1","generated_at":"2026-04-23T03:36:59+00:00","cve":"CVE-2020-15564","urls":{"html":"https://cve.report/CVE-2020-15564","api":"https://cve.report/api/cve/CVE-2020-15564.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-15564","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-15564"},"summary":{"title":"CVE-2020-15564","description":"An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOP_register_vcpu_info. The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). All Xen versions are vulnerable. Only Arm systems are vulnerable. x86 systems are not affected.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2020-07-07 13:15:00","updated_at":"2023-11-07 03:17:00"},"problem_types":["CWE-119"],"metrics":[],"references":[{"url":"https://security.gentoo.org/glsa/202007-02","name":"GLSA-202007-02","refsource":"GENTOO","tags":[],"title":"Xen: Multiple vulnerabilities (GLSA 202007-02) — Gentoo security","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/","name":"FEDORA-2020-76cf2b0f0a","refsource":"","tags":[],"title":"[SECURITY] Fedora 31 Update: xen-4.12.3-3.fc31 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/","name":"FEDORA-2020-fbc13516af","refsource":"","tags":[],"title":"[SECURITY] Fedora 32 Update: xen-4.13.1-4.fc32 - 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