Is CVE-2021-26401 in the CISA KEV catalog?

No. CVE-2021-26401 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-26401?

CVE-2021-26401 has a CVSS v3 base score of 5.6 (MEDIUM).

What is the EPSS score for CVE-2021-26401?

CVE-2021-26401 has an EPSS score of 0.28% (20th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26401?

Upgrade linux on debian 11 to 5.10.103-1 or later. Fixes are available for 114 affected products.

CVE & CISA-KEV Catalog

CVE-2021-26401

MEDIUM

5.6

CVSS v3

NVD

Description

LFENCE/JMP (mitigation V2-2) may not sufficiently mitigate CVE-2017-5715 on some AMD CPUs.

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.103-1CVE-2021-26401

Fixed in:5.16.12-1CVE-2021-26401

linuxUbuntu

Fixed in:4.4.0-239.273USN-6014-1

Fixed in:4.15.0-177.186USN-5418-1

Fixed in:5.4.0-110.124USN-5415-1

linux-awsUbuntu

Fixed in:4.4.0-1117.123USN-6013-1

Fixed in:4.4.0-1155.170USN-6001-1

Fixed in:4.15.0-1128.137USN-5418-1

Fixed in:5.4.0-1073.78USN-5415-1

linux-aws-5.13Ubuntu

Fixed in:5.13.0-1023.25~20.04.1USN-5417-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1128.137~16.04.1USN-5418-1

linux-azureUbuntu

Fixed in:4.15.0-1138.151~14.04.1USN-5418-1

Fixed in:4.15.0-1138.151~16.04.1USN-5418-1

Fixed in:5.4.0-1078.81USN-5415-1

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1138.151USN-5418-1

linux-azure-5.13Ubuntu

Fixed in:5.13.0-1023.27~20.04.1USN-5417-1

linux-azure-5.4Ubuntu

Fixed in:5.4.0-1078.81~18.04.1USN-5415-1

linux-azure-fdeUbuntu

Fixed in:5.4.0-1078.81+cvm1.1USN-5415-1

linux-dell300xUbuntu

Fixed in:4.15.0-1042.47USN-5418-1

linux-gcpUbuntu

Fixed in:4.15.0-1122.136~16.04.1USN-5418-1

Fixed in:5.4.0-1073.78USN-5415-1

linux-gcp-4.15Ubuntu

Fixed in:4.15.0-1122.136USN-5418-1

linux-gcp-5.13Ubuntu

Fixed in:5.13.0-1025.30~20.04.1USN-5417-1

linux-gcp-5.4Ubuntu

Fixed in:5.4.0-1073.78~18.04.1USN-5415-1

linux-gkeUbuntu

Fixed in:5.4.0-1071.76USN-5415-1

linux-gkeopUbuntu

Fixed in:5.4.0-1040.41USN-5415-1

linux-gkeop-5.4Ubuntu

Fixed in:5.4.0-1040.41~18.04.1USN-5415-1

linux-hweUbuntu

Fixed in:4.15.0-177.186~16.04.1USN-5418-1

linux-hwe-5.13Ubuntu

Fixed in:5.13.0-41.46~20.04.1USN-5417-1

linux-hwe-5.4Ubuntu

Fixed in:5.4.0-110.124~18.04.1USN-5415-1

linux-ibmUbuntu

Fixed in:5.4.0-1021.23USN-5415-1

linux-ibm-5.4Ubuntu

Fixed in:5.4.0-1021.23~18.04.1USN-5415-1

linux-image-4.15.0-1042-dell300xUbuntu

Fixed in:4.15.0-1042.47USN-5418-1

linux-image-4.15.0-1093-oracleUbuntu

Fixed in:4.15.0-1093.102~16.04.1USN-5418-1

Fixed in:4.15.0-1093.102USN-5418-1

linux-image-4.15.0-1114-kvmUbuntu

Fixed in:4.15.0-1114.117USN-5418-1

linux-image-4.15.0-1122-gcpUbuntu

Fixed in:4.15.0-1122.136~16.04.1USN-5418-1

Fixed in:4.15.0-1122.136USN-5418-1

linux-image-4.15.0-1127-snapdragonUbuntu

Fixed in:4.15.0-1127.136USN-5418-1

linux-image-4.15.0-1128-awsUbuntu

Fixed in:4.15.0-1128.137USN-5418-1

linux-image-4.15.0-1128-aws-hweUbuntu

Fixed in:4.15.0-1128.137~16.04.1USN-5418-1

linux-image-4.15.0-1138-azureUbuntu

Fixed in:4.15.0-1138.151~14.04.1USN-5418-1

Fixed in:4.15.0-1138.151~16.04.1USN-5418-1

Fixed in:4.15.0-1138.151USN-5418-1

linux-image-4.15.0-177-genericUbuntu

Fixed in:4.15.0-177.186~16.04.1USN-5418-1

Fixed in:4.15.0-177.186USN-5418-1

linux-image-4.15.0-177-generic-lpaeUbuntu

Fixed in:4.15.0-177.186USN-5418-1

linux-image-4.15.0-177-lowlatencyUbuntu

Fixed in:4.15.0-177.186~16.04.1USN-5418-1

Fixed in:4.15.0-177.186USN-5418-1

linux-image-4.4.0-1117-awsUbuntu

Fixed in:4.4.0-1117.123USN-6013-1

linux-image-4.4.0-1118-kvmUbuntu

Fixed in:4.4.0-1118.128USN-6014-1

linux-image-4.4.0-1155-awsUbuntu

Fixed in:4.4.0-1155.170USN-6001-1

linux-image-4.4.0-239-genericUbuntu

Fixed in:4.4.0-239.273~14.04.1USN-6014-1

Fixed in:4.4.0-239.273USN-6014-1

linux-image-4.4.0-239-lowlatencyUbuntu

Fixed in:4.4.0-239.273~14.04.1USN-6014-1

Fixed in:4.4.0-239.273USN-6014-1

linux-image-5.13.0-1023-awsUbuntu

Fixed in:5.13.0-1023.25~20.04.1USN-5417-1

linux-image-5.13.0-1023-azureUbuntu

Fixed in:5.13.0-1023.27~20.04.1USN-5417-1

linux-image-5.13.0-1025-gcpUbuntu

Fixed in:5.13.0-1025.30~20.04.1USN-5417-1

linux-image-5.13.0-41-genericUbuntu

Fixed in:5.13.0-41.46~20.04.1USN-5417-1

linux-image-5.13.0-41-generic-64kUbuntu

Fixed in:5.13.0-41.46~20.04.1USN-5417-1

linux-image-5.13.0-41-generic-lpaeUbuntu

Fixed in:5.13.0-41.46~20.04.1USN-5417-1

linux-image-5.13.0-41-lowlatencyUbuntu

Fixed in:5.13.0-41.46~20.04.1USN-5417-1

linux-image-5.4.0-1021-ibmUbuntu

Fixed in:5.4.0-1021.23~18.04.1USN-5415-1

Fixed in:5.4.0-1021.23USN-5415-1

linux-image-5.4.0-1040-gkeopUbuntu

Fixed in:5.4.0-1040.41~18.04.1USN-5415-1

Fixed in:5.4.0-1040.41USN-5415-1

linux-image-5.4.0-1060-raspiUbuntu

Fixed in:5.4.0-1060.68~18.04.1USN-5415-1

Fixed in:5.4.0-1060.68USN-5415-1

linux-image-5.4.0-1063-kvmUbuntu

Fixed in:5.4.0-1063.66USN-5415-1

linux-image-5.4.0-1071-gkeUbuntu

Fixed in:5.4.0-1071.76USN-5415-1

linux-image-5.4.0-1071-oracleUbuntu

Fixed in:5.4.0-1071.77~18.04.1USN-5415-1

Fixed in:5.4.0-1071.77USN-5415-1

linux-image-5.4.0-1073-awsUbuntu

Fixed in:5.4.0-1073.78USN-5415-1

linux-image-5.4.0-1073-gcpUbuntu

Fixed in:5.4.0-1073.78~18.04.1USN-5415-1

Fixed in:5.4.0-1073.78USN-5415-1

linux-image-5.4.0-1078-azureUbuntu

Fixed in:5.4.0-1078.81~18.04.1USN-5415-1

Fixed in:5.4.0-1078.81USN-5415-1

linux-image-5.4.0-1078-azure-fdeUbuntu

Fixed in:5.4.0-1078.81+cvm1.1USN-5415-1

linux-image-5.4.0-110-genericUbuntu

Fixed in:5.4.0-110.124~18.04.1USN-5415-1

Fixed in:5.4.0-110.124USN-5415-1

linux-image-5.4.0-110-generic-lpaeUbuntu

Fixed in:5.4.0-110.124~18.04.1USN-5415-1

Fixed in:5.4.0-110.124USN-5415-1

linux-image-5.4.0-110-lowlatencyUbuntu

Fixed in:5.4.0-110.124~18.04.1USN-5415-1

Fixed in:5.4.0-110.124USN-5415-1

linux-image-awsUbuntu

Fixed in:4.4.0.1117.114USN-6013-1

Fixed in:4.4.0.1155.159USN-6001-1

Fixed in:5.13.0.1023.25~20.04.16USN-5417-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1128.118USN-5418-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1128.131USN-5418-1

linux-image-aws-lts-20.04Ubuntu

Fixed in:5.4.0.1073.75USN-5415-1

linux-image-azureUbuntu

Fixed in:4.15.0.1138.110USN-5418-1

Fixed in:4.15.0.1138.128USN-5418-1

Fixed in:5.4.0.1078.57USN-5415-1

Fixed in:5.13.0.1023.27~20.04.12USN-5417-1

linux-image-azure-fdeUbuntu

Fixed in:5.4.0.1078.81+cvm1.22USN-5415-1

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1138.111USN-5418-1

linux-image-azure-lts-20.04Ubuntu

Fixed in:5.4.0.1078.76USN-5415-1

linux-image-dell300xUbuntu

Fixed in:4.15.0.1042.44USN-5418-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1122.123USN-5418-1

Fixed in:5.4.0.1073.57USN-5415-1

Fixed in:5.13.0.1025.30~20.04.1USN-5417-1

linux-image-gcp-lts-18.04Ubuntu

Fixed in:4.15.0.1122.141USN-5418-1

linux-image-gcp-lts-20.04Ubuntu

Fixed in:5.4.0.1073.81USN-5415-1

linux-image-genericUbuntu

Fixed in:4.4.0.239.245USN-6014-1

Fixed in:4.15.0.177.166USN-5418-1

Fixed in:5.4.0.110.114USN-5415-1

linux-image-generic-64k-hwe-20.04Ubuntu

Fixed in:5.13.0.41.46~20.04.26USN-5417-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.177.169USN-5418-1

linux-image-generic-hwe-18.04Ubuntu

Fixed in:5.4.0.110.124~18.04.95USN-5415-1

linux-image-generic-hwe-20.04Ubuntu

Fixed in:5.13.0.41.46~20.04.26USN-5417-1

linux-image-generic-lpaeUbuntu

Fixed in:4.15.0.177.166USN-5418-1

Fixed in:5.4.0.110.114USN-5415-1

linux-image-generic-lpae-hwe-18.04Ubuntu

Fixed in:5.4.0.110.124~18.04.95USN-5415-1

linux-image-generic-lpae-hwe-20.04Ubuntu

Fixed in:5.13.0.41.46~20.04.26USN-5417-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.239.207USN-6014-1

Fixed in:4.4.0.239.245USN-6014-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1122.123USN-5418-1

Fixed in:5.4.0.1071.80USN-5415-1

linux-image-gke-5.4Ubuntu

Fixed in:5.4.0.1071.80USN-5415-1

linux-image-gkeopUbuntu

Fixed in:5.4.0.1040.43USN-5415-1

linux-image-gkeop-5.4Ubuntu

Fixed in:5.4.0.1040.41~18.04.40USN-5415-1

Fixed in:5.4.0.1040.43USN-5415-1

linux-image-ibmUbuntu

Fixed in:5.4.0.1021.38USN-5415-1

Fixed in:5.4.0.1021.21USN-5415-1

linux-image-ibm-lts-20.04Ubuntu

Fixed in:5.4.0.1021.21USN-5415-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1118.115USN-6014-1

Fixed in:4.15.0.1114.110USN-5418-1

Fixed in:5.4.0.1063.62USN-5415-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.239.245USN-6014-1

Fixed in:4.15.0.177.166USN-5418-1

Fixed in:5.4.0.110.114USN-5415-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.177.169USN-5418-1

linux-image-lowlatency-hwe-18.04Ubuntu

Fixed in:5.4.0.110.124~18.04.95USN-5415-1

linux-image-lowlatency-hwe-20.04Ubuntu

Fixed in:5.13.0.41.46~20.04.26USN-5417-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.239.207USN-6014-1

Fixed in:4.4.0.239.245USN-6014-1

linux-image-oemUbuntu

Fixed in:4.15.0.177.169USN-5418-1

Fixed in:5.4.0.110.124~18.04.95USN-5415-1

Fixed in:5.4.0.110.114USN-5415-1

linux-image-oem-osp1Ubuntu

Fixed in:5.4.0.110.124~18.04.95USN-5415-1

Fixed in:5.4.0.110.114USN-5415-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1093.81USN-5418-1

Fixed in:5.4.0.1071.77~18.04.50USN-5415-1

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1093.103USN-5418-1

linux-image-oracle-lts-20.04Ubuntu

Fixed in:5.4.0.1071.71USN-5415-1

linux-image-raspiUbuntu

Fixed in:5.4.0.1060.94USN-5415-1

linux-image-raspi-hwe-18.04Ubuntu

Fixed in:5.4.0.1060.61USN-5415-1

linux-image-raspi2Ubuntu

Fixed in:5.4.0.1060.94USN-5415-1

linux-image-snapdragonUbuntu

Fixed in:4.15.0.1127.130USN-5418-1

linux-image-snapdragon-hwe-18.04Ubuntu

Fixed in:5.4.0.110.124~18.04.95USN-5415-1

linux-image-virtualUbuntu

Fixed in:4.4.0.239.245USN-6014-1

Fixed in:4.15.0.177.166USN-5418-1

Fixed in:5.4.0.110.114USN-5415-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.177.169USN-5418-1

linux-image-virtual-hwe-18.04Ubuntu

Fixed in:5.4.0.110.124~18.04.95USN-5415-1

linux-image-virtual-hwe-20.04Ubuntu

Fixed in:5.13.0.41.46~20.04.26USN-5417-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.239.207USN-6014-1

Fixed in:4.4.0.239.245USN-6014-1

linux-kvmUbuntu

Fixed in:4.4.0-1118.128USN-6014-1

Fixed in:4.15.0-1114.117USN-5418-1

Fixed in:5.4.0-1063.66USN-5415-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-239.273~14.04.1USN-6014-1

linux-oracleUbuntu

Fixed in:4.15.0-1093.102~16.04.1USN-5418-1

Fixed in:4.15.0-1093.102USN-5418-1

Fixed in:5.4.0-1071.77USN-5415-1

linux-oracle-5.4Ubuntu

Fixed in:5.4.0-1071.77~18.04.1USN-5415-1

linux-raspiUbuntu

Fixed in:5.4.0-1060.68USN-5415-1

linux-raspi-5.4Ubuntu

Fixed in:5.4.0-1060.68~18.04.1USN-5415-1

linux-snapdragonUbuntu

Fixed in:4.15.0-1127.136USN-5418-1

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 ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.28%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Vendor Advisory1

amd.com

Third-Party Advisory1

openwall.com

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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.