{"id":"CVE-2019-20908","details":"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.","modified":"2026-03-12T23:13:04.190786Z","published":"2020-07-15T22:15:13.780Z","related":["SUSE-SU-2020:2103-1","SUSE-SU-2020:2106-1","SUSE-SU-2020:2107-1","SUSE-SU-2020:2119-1","SUSE-SU-2020:2121-1","SUSE-SU-2020:2122-1","SUSE-SU-2020:2478-1","SUSE-SU-2020:2487-1","openSUSE-SU-2020:1153-1"],"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/07/20/6"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/07/29/3"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/07/30/3"},{"type":"ADVISORY","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4439-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4440-1/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/07/30/2"},{"type":"ADVISORY","url":"https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4426-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4427-1/"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e"},{"type":"FIX","url":"https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.4"}]},{"events":[{"introduced":"0"},{"last_affected":"15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-20908.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"}]}