Is CVE-2019-20908 in the CISA KEV catalog?

No. CVE-2019-20908 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-20908?

CVE-2019-20908 has a CVSS v3 base score of 6.7 (MEDIUM).

What is the EPSS score for CVE-2019-20908?

CVE-2019-20908 has an EPSS score of 0.51% (40th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-20908?

Upgrade linux on debian 11 to 5.2.6-1 or later. Fixes are available for 98 affected products.

CVE & CISA-KEV Catalog

CVE-2019-20908

MEDIUM

6.7

CVSS v3

NVD

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.

How to fix

Remediation Available

linuxDebian

Fixed in:5.2.6-1CVE-2019-20908

linuxUbuntu

Fixed in:4.4.0-186.216USN-4427-1

Fixed in:4.15.0-112.113USN-4426-1

linux-awsUbuntu

Fixed in:4.4.0-1075.79USN-4427-1

Fixed in:4.4.0-1111.123USN-4427-1

Fixed in:4.15.0-1079.83USN-4426-1

linux-aws-5.3Ubuntu

Fixed in:5.3.0-1032.34~18.04.2USN-4440-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1079.83~16.04.1USN-4426-1

linux-azureUbuntu

Fixed in:4.15.0-1092.102~16.04.1USN-4426-1

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1092.102USN-4426-1

linux-azure-5.3Ubuntu

Fixed in:5.3.0-1034.35~18.04.1USN-4440-1

linux-gcpUbuntu

Fixed in:4.15.0-1080.90~16.04.1USN-4426-1

linux-gcp-4.15Ubuntu

Fixed in:4.15.0-1080.90USN-4426-1

linux-gcp-5.3Ubuntu

Fixed in:5.3.0-1032.34~18.04.1USN-4440-1

linux-gke-4.15Ubuntu

Fixed in:4.15.0-1066.69USN-4426-1

linux-gke-5.0Ubuntu

Fixed in:5.0.0-1045.46USN-4439-1

linux-gke-5.3Ubuntu

Fixed in:5.3.0-1032.34~18.04.1USN-4440-1

linux-hweUbuntu

Fixed in:4.15.0-112.113~16.04.1USN-4426-1

Fixed in:5.3.0-64.58~18.04.1USN-4440-1

linux-image-4.15.0-1050-oracleUbuntu

Fixed in:4.15.0-1050.54~16.04.1USN-4426-1

Fixed in:4.15.0-1050.54USN-4426-1

linux-image-4.15.0-1066-gkeUbuntu

Fixed in:4.15.0-1066.69USN-4426-1

linux-image-4.15.0-1067-raspi2Ubuntu

Fixed in:4.15.0-1067.71USN-4426-1

linux-image-4.15.0-1071-kvmUbuntu

Fixed in:4.15.0-1071.72USN-4426-1

linux-image-4.15.0-1079-awsUbuntu

Fixed in:4.15.0-1079.83~16.04.1USN-4426-1

Fixed in:4.15.0-1079.83USN-4426-1

linux-image-4.15.0-1080-gcpUbuntu

Fixed in:4.15.0-1080.90~16.04.1USN-4426-1

Fixed in:4.15.0-1080.90USN-4426-1

linux-image-4.15.0-1092-azureUbuntu

Fixed in:4.15.0-1092.102~16.04.1USN-4426-1

Fixed in:4.15.0-1092.102USN-4426-1

linux-image-4.15.0-1093-oemUbuntu

Fixed in:4.15.0-1093.103USN-4426-1

linux-image-4.15.0-112-genericUbuntu

Fixed in:4.15.0-112.113~16.04.1USN-4426-1

Fixed in:4.15.0-112.113USN-4426-1

linux-image-4.15.0-112-generic-lpaeUbuntu

Fixed in:4.15.0-112.113~16.04.1USN-4426-1

Fixed in:4.15.0-112.113USN-4426-1

linux-image-4.15.0-112-lowlatencyUbuntu

Fixed in:4.15.0-112.113~16.04.1USN-4426-1

Fixed in:4.15.0-112.113USN-4426-1

linux-image-4.4.0-1075-awsUbuntu

Fixed in:4.4.0-1075.79USN-4427-1

linux-image-4.4.0-1077-kvmUbuntu

Fixed in:4.4.0-1077.84USN-4427-1

linux-image-4.4.0-1111-awsUbuntu

Fixed in:4.4.0-1111.123USN-4427-1

linux-image-4.4.0-1136-raspi2Ubuntu

Fixed in:4.4.0-1136.145USN-4427-1

linux-image-4.4.0-1140-snapdragonUbuntu

Fixed in:4.4.0-1140.148USN-4427-1

linux-image-4.4.0-186-genericUbuntu

Fixed in:4.4.0-186.216~14.04.1USN-4427-1

Fixed in:4.4.0-186.216USN-4427-1

linux-image-4.4.0-186-generic-lpaeUbuntu

Fixed in:4.4.0-186.216~14.04.1USN-4427-1

Fixed in:4.4.0-186.216USN-4427-1

linux-image-4.4.0-186-lowlatencyUbuntu

Fixed in:4.4.0-186.216~14.04.1USN-4427-1

Fixed in:4.4.0-186.216USN-4427-1

linux-image-4.4.0-186-powerpc-e500mcUbuntu

Fixed in:4.4.0-186.216~14.04.1USN-4427-1

Fixed in:4.4.0-186.216USN-4427-1

linux-image-4.4.0-186-powerpc-smpUbuntu

Fixed in:4.4.0-186.216~14.04.1USN-4427-1

Fixed in:4.4.0-186.216USN-4427-1

linux-image-4.4.0-186-powerpc64-embUbuntu

Fixed in:4.4.0-186.216~14.04.1USN-4427-1

Fixed in:4.4.0-186.216USN-4427-1

linux-image-4.4.0-186-powerpc64-smpUbuntu

Fixed in:4.4.0-186.216~14.04.1USN-4427-1

Fixed in:4.4.0-186.216USN-4427-1

linux-image-5.0.0-1045-gkeUbuntu

Fixed in:5.0.0-1045.46USN-4439-1

linux-image-5.0.0-1065-oem-osp1Ubuntu

Fixed in:5.0.0-1065.70USN-4439-1

linux-image-5.3.0-1030-oracleUbuntu

Fixed in:5.3.0-1030.32~18.04.1USN-4440-1

linux-image-5.3.0-1030-raspi2Ubuntu

Fixed in:5.3.0-1030.32~18.04.2USN-4440-1

linux-image-5.3.0-1032-awsUbuntu

Fixed in:5.3.0-1032.34~18.04.2USN-4440-1

linux-image-5.3.0-1032-gcpUbuntu

Fixed in:5.3.0-1032.34~18.04.1USN-4440-1

linux-image-5.3.0-1032-gkeUbuntu

Fixed in:5.3.0-1032.34~18.04.1USN-4440-1

linux-image-5.3.0-1034-azureUbuntu

Fixed in:5.3.0-1034.35~18.04.1USN-4440-1

linux-image-5.3.0-64-genericUbuntu

Fixed in:5.3.0-64.58~18.04.1USN-4440-1

linux-image-5.3.0-64-generic-lpaeUbuntu

Fixed in:5.3.0-64.58~18.04.1USN-4440-1

linux-image-5.3.0-64-lowlatencyUbuntu

Fixed in:5.3.0-64.58~18.04.1USN-4440-1

linux-image-awsUbuntu

Fixed in:4.4.0.1075.72USN-4427-1

Fixed in:4.4.0.1111.116USN-4427-1

Fixed in:5.3.0.1032.31USN-4440-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1079.76USN-4426-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1079.81USN-4426-1

linux-image-azureUbuntu

Fixed in:4.15.0.1092.87USN-4426-1

Fixed in:5.3.0.1034.30USN-4440-1

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1092.63USN-4426-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1080.82USN-4426-1

Fixed in:5.3.0.1032.26USN-4440-1

linux-image-gcp-lts-18.04Ubuntu

Fixed in:4.15.0.1080.96USN-4426-1

linux-image-genericUbuntu

Fixed in:4.4.0.186.192USN-4427-1

Fixed in:4.15.0.112.100USN-4426-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.112.114USN-4426-1

linux-image-generic-lpaeUbuntu

Fixed in:4.4.0.186.192USN-4427-1

Fixed in:4.15.0.112.100USN-4426-1

linux-image-generic-lpae-hwe-16.04Ubuntu

Fixed in:4.15.0.112.114USN-4426-1

linux-image-generic-lpae-lts-xenialUbuntu

Fixed in:4.4.0.186.163USN-4427-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.186.163USN-4427-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1080.82USN-4426-1

Fixed in:4.15.0.1066.68USN-4426-1

linux-image-gke-4.15Ubuntu

Fixed in:4.15.0.1066.68USN-4426-1

linux-image-gke-5.0Ubuntu

Fixed in:5.0.0.1045.30USN-4439-1

linux-image-gke-5.3Ubuntu

Fixed in:5.3.0.1032.17USN-4440-1

linux-image-gkeop-5.3Ubuntu

Fixed in:5.3.0.64.120USN-4440-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1077.75USN-4427-1

Fixed in:4.15.0.1071.67USN-4426-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.186.192USN-4427-1

Fixed in:4.15.0.112.100USN-4426-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.112.114USN-4426-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.186.163USN-4427-1

linux-image-oemUbuntu

Fixed in:4.15.0.112.114USN-4426-1

Fixed in:4.15.0.1093.96USN-4426-1

linux-image-oem-osp1Ubuntu

Fixed in:5.0.0.1065.63USN-4439-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1050.41USN-4426-1

Fixed in:5.3.0.1030.27USN-4440-1

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1050.59USN-4426-1

linux-image-powerpc-e500mcUbuntu

Fixed in:4.4.0.186.192USN-4427-1

linux-image-powerpc-e500mc-lts-xenialUbuntu

Fixed in:4.4.0.186.163USN-4427-1

linux-image-powerpc-smpUbuntu

Fixed in:4.4.0.186.192USN-4427-1

linux-image-powerpc-smp-lts-xenialUbuntu

Fixed in:4.4.0.186.163USN-4427-1

linux-image-powerpc64-embUbuntu

Fixed in:4.4.0.186.192USN-4427-1

linux-image-powerpc64-emb-lts-xenialUbuntu

Fixed in:4.4.0.186.163USN-4427-1

linux-image-powerpc64-smpUbuntu

Fixed in:4.4.0.186.192USN-4427-1

linux-image-powerpc64-smp-lts-xenialUbuntu

Fixed in:4.4.0.186.163USN-4427-1

linux-image-raspi2Ubuntu

Fixed in:4.4.0.1136.136USN-4427-1

Fixed in:4.15.0.1067.65USN-4426-1

linux-image-raspi2-hwe-18.04Ubuntu

Fixed in:5.3.0.1030.20USN-4440-1

linux-image-snapdragonUbuntu

Fixed in:4.4.0.1140.132USN-4427-1

linux-image-virtualUbuntu

Fixed in:4.4.0.186.192USN-4427-1

Fixed in:4.15.0.112.100USN-4426-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.112.114USN-4426-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.186.163USN-4427-1

linux-kvmUbuntu

Fixed in:4.4.0-1077.84USN-4427-1

Fixed in:4.15.0-1071.72USN-4426-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-186.216~14.04.1USN-4427-1

linux-oemUbuntu

Fixed in:4.15.0-1093.103USN-4426-1

linux-oem-osp1Ubuntu

Fixed in:5.0.0-1065.70USN-4439-1

linux-oracleUbuntu

Fixed in:4.15.0-1050.54~16.04.1USN-4426-1

Fixed in:4.15.0-1050.54USN-4426-1

linux-oracle-5.3Ubuntu

Fixed in:5.3.0-1030.32~18.04.1USN-4440-1

linux-raspi2Ubuntu

Fixed in:4.4.0-1136.145USN-4427-1

Fixed in:4.15.0-1067.71USN-4426-1

linux-raspi2-5.3Ubuntu

Fixed in:5.3.0-1030.32~18.04.2USN-4440-1

linux-snapdragonUbuntu

Fixed in:4.4.0-1140.148USN-4427-1

Fixed in:4.15.0-1083.91USN-4426-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.51%probability of exploitation in 30 days

40thpercentile

Moderate risk: more likely to be exploited than 40% of all known CVEs.

References

Patch2

Vendor Advisory1

cdn.kernel.org

Third-Party Advisory10

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.