{"cve":"CVE-2019-20908","nvd":{"published":"2020-07-15T22:15:13.780","modified":"2026-06-17T02:31:24.953","status":"Modified","description":"An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":6.7},"cwes":[],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html","http://www.openwall.com/lists/oss-security/2020/07/20/6","http://www.openwall.com/lists/oss-security/2020/07/29/3","http://www.openwall.com/lists/oss-security/2020/07/30/2","http://www.openwall.com/lists/oss-security/2020/07/30/3"],"products":["canonical:ubuntu_linux","linux:linux_kernel","opensuse:leap"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2019-20908","score":0.00536,"percentile":0.45192,"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."]}