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kernel: lockdown: bypass through ACPI write via efivar_ssdt

🗓️ 29 Jul 2020 20:19:21Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 8 Views

ACPI tables loaded via firmware variables and efivar_ssdt allow a root bypass of kernel lockdown.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
BDU FSTEC		The vulnerability in the driver/firmware/EFI code of the Linux operating system allows a hacker to bypass security restrictions.
19 May 202100:00
–bdu_fstec
CNVD		Unspecified vulnerability in Linux kernel (CNVD-2020-52434)
22 Jul 202000:00
–cnvd
CVE		CVE-2019-20908
15 Jul 202021:24
–cve
Cvelist		CVE-2019-20908
15 Jul 202021:24
–cvelist
Debian CVE		CVE-2019-20908
15 Jul 202021:24
–debiancve
Oracle linux		kernel security and bug fix update
30 Jul 202000:00
–oraclelinux
Oracle linux		Unbreakable Enterprise kernel security update
29 Jul 202000:00
–oraclelinux
Oracle linux		Unbreakable Enterprise kernel security update
10 Aug 202000:00
–oraclelinux
EUVD		EUVD-2019-11442
7 Oct 202500:30
–euvd
Tenable Nessus		MiracleLinux 8 : kernel-4.18.0-193.14.3.el8 (AXSA:2020-898:14)
20 Jan 202600:00
–nessus
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.0ppc64lebpftool0:4.18.0-80.27.2.el8_0bpftool-0:4.18.0-80.27.2.el8_0.ppc64le.rpm
Red Hat Enterprise Linux8.0x86_64bpftool0:4.18.0-80.27.2.el8_0bpftool-0:4.18.0-80.27.2.el8_0.x86_64.rpm
Red Hat Enterprise Linux8.0ppc64lebpftool-debuginfo0:4.18.0-80.27.2.el8_0bpftool-debuginfo-0:4.18.0-80.27.2.el8_0.ppc64le.rpm
Red Hat Enterprise Linux8.0x86_64bpftool-debuginfo0:4.18.0-80.27.2.el8_0bpftool-debuginfo-0:4.18.0-80.27.2.el8_0.x86_64.rpm
Red Hat Enterprise Linux8.0ppc64lekernel0:4.18.0-80.27.2.el8_0kernel-0:4.18.0-80.27.2.el8_0.ppc64le.rpm
Red Hat Enterprise Linux8.0x86_64kernel0:4.18.0-80.27.2.el8_0kernel-0:4.18.0-80.27.2.el8_0.x86_64.rpm
Red Hat Enterprise Linux8.0anykernel-abi-whitelists0:4.18.0-80.27.2.el8_0.noarchkernel-abi-whitelists-0:4.18.0-80.27.2.el8_0.noarch.noarch.rpm
Red Hat Enterprise Linux8.0ppc64lekernel-core0:4.18.0-80.27.2.el8_0kernel-core-0:4.18.0-80.27.2.el8_0.ppc64le.rpm
Red Hat Enterprise Linux8.0x86_64kernel-core0:4.18.0-80.27.2.el8_0kernel-core-0:4.18.0-80.27.2.el8_0.x86_64.rpm
Red Hat Enterprise Linux8.0ppc64lekernel-cross-headers0:4.18.0-80.27.2.el8_0kernel-cross-headers-0:4.18.0-80.27.2.el8_0.ppc64le.rpm
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28 Jun 2026 12:33Current
7.1High risk
Vulners AI Score7.1
CVSS 3.16.7
CVSS 26.9
EPSS0.00514
CWE-284
kernel lockdownfirmware tablesfirmware variablesefivar_ssdtroot bypassprivilege escalationconfidentialityintegrityavailability
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