{"cve":"CVE-2020-15706","nvd":{"published":"2020-07-29T18:15:14.420","modified":"2026-06-17T02:57:05.490","status":"Modified","description":"GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","score":6.4},"cwes":["CWE-362","CWE-416"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html","http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html","http://ubuntu.com/security/notices/USN-4432-1","http://www.openwall.com/lists/oss-security/2020/07/29/3","https://access.redhat.com/security/vulnerabilities/grub2bootloader"],"products":["canonical:ubuntu_linux","debian:debian_linux","gnu:grub2","microsoft:windows_10","microsoft:windows_8.1","microsoft:windows_rt_8.1","microsoft:windows_server_2012","microsoft:windows_server_2016","microsoft:windows_server_2019","opensuse:leap","redhat:enterprise_linux","redhat:enterprise_linux_atomic_host","redhat:openshift_container_platform","suse:suse_linux_enterprise_server"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-15706","score":0.00977,"percentile":0.62152,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}