Is CVE-2020-26147 in the CISA KEV catalog?

No. CVE-2020-26147 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-26147?

CVE-2020-26147 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2020-26147?

CVE-2020-26147 has an EPSS score of 7.60% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-26147?

Upgrade linux on debian 11 to 5.10.46-1 or later. Fixes are available for 117 affected products.

CVE & CISA-KEV Catalog

CVE-2020-26147

MEDIUMEPSS 94th pctl

5.4

CVSS v3

NVD

Description

An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used.

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.46-1CVE-2020-26147

linuxUbuntu

Fixed in:4.4.0-222.255USN-5343-1

Fixed in:4.4.0-219.252USN-5299-1

Fixed in:4.15.0-151.157USN-5018-1

Fixed in:5.4.0-77.86USN-5000-1

linux-awsUbuntu

Fixed in:4.4.0-1102.107USN-5343-1

Fixed in:4.4.0-1099.104USN-5299-1

Fixed in:4.4.0-1138.152USN-5343-1

Fixed in:4.4.0-1135.149USN-5299-1

Fixed in:4.15.0-1109.116USN-5018-1

Fixed in:5.4.0-1051.53USN-5000-1

linux-aws-5.4Ubuntu

Fixed in:5.4.0-1051.53~18.04.1USN-5000-1

linux-aws-5.8Ubuntu

Fixed in:5.8.0-1038.40~20.04.1USN-4999-1

linux-aws-hweUbuntu

Fixed in:4.15.0-1109.116~16.04.1USN-5018-1

linux-azureUbuntu

Fixed in:4.15.0-1121.134~14.04.1USN-5018-1

Fixed in:4.15.0-1121.134~16.04.1USN-5018-1

Fixed in:5.4.0-1051.53USN-5000-1

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1121.134USN-5018-1

linux-azure-5.4Ubuntu

Fixed in:5.4.0-1051.53~18.04.1USN-5000-1

linux-azure-5.8Ubuntu

Fixed in:5.8.0-1036.38~20.04.1USN-4999-1

linux-gcpUbuntu

Fixed in:4.15.0-1106.120~16.04.1USN-5018-1

Fixed in:5.4.0-1046.49USN-5000-1

linux-gcp-4.15Ubuntu

Fixed in:4.15.0-1106.120USN-5018-1

linux-gcp-5.4Ubuntu

Fixed in:5.4.0-1046.49~18.04.1USN-5000-1

linux-gcp-5.8Ubuntu

Fixed in:5.8.0-1035.37~20.04.1USN-4999-1

linux-gkeUbuntu

Fixed in:5.4.0-1046.48USN-5000-1

linux-gke-5.4Ubuntu

Fixed in:5.4.0-1046.48~18.04.1USN-5000-1

linux-gkeopUbuntu

Fixed in:5.4.0-1018.19USN-5000-1

linux-gkeop-5.4Ubuntu

Fixed in:5.4.0-1018.19~18.04.1USN-5000-1

linux-hweUbuntu

Fixed in:4.15.0-151.157~16.04.1USN-5018-1

linux-hwe-5.4Ubuntu

Fixed in:5.4.0-77.86~18.04.1USN-5000-1

linux-hwe-5.8Ubuntu

Fixed in:5.8.0-59.66~20.04.1USN-4999-1

linux-image-4.15.0-1078-oracleUbuntu

Fixed in:4.15.0-1078.86~16.04.1USN-5018-1

Fixed in:4.15.0-1078.86USN-5018-1

linux-image-4.15.0-1092-raspi2Ubuntu

Fixed in:4.15.0-1092.98USN-5018-1

linux-image-4.15.0-1097-kvmUbuntu

Fixed in:4.15.0-1097.99USN-5018-1

linux-image-4.15.0-1106-gcpUbuntu

Fixed in:4.15.0-1106.120~16.04.1USN-5018-1

Fixed in:4.15.0-1106.120USN-5018-1

linux-image-4.15.0-1109-awsUbuntu

Fixed in:4.15.0-1109.116~16.04.1USN-5018-1

Fixed in:4.15.0-1109.116USN-5018-1

linux-image-4.15.0-1109-snapdragonUbuntu

Fixed in:4.15.0-1109.118USN-5018-1

linux-image-4.15.0-1121-azureUbuntu

Fixed in:4.15.0-1121.134~14.04.1USN-5018-1

Fixed in:4.15.0-1121.134~16.04.1USN-5018-1

Fixed in:4.15.0-1121.134USN-5018-1

linux-image-4.15.0-151-genericUbuntu

Fixed in:4.15.0-151.157~16.04.1USN-5018-1

Fixed in:4.15.0-151.157USN-5018-1

linux-image-4.15.0-151-generic-lpaeUbuntu

Fixed in:4.15.0-151.157USN-5018-1

linux-image-4.15.0-151-lowlatencyUbuntu

Fixed in:4.15.0-151.157~16.04.1USN-5018-1

Fixed in:4.15.0-151.157USN-5018-1

linux-image-4.4.0-1099-awsUbuntu

Fixed in:4.4.0-1099.104USN-5299-1

linux-image-4.4.0-1100-kvmUbuntu

Fixed in:4.4.0-1100.109USN-5299-1

linux-image-4.4.0-1102-awsUbuntu

Fixed in:4.4.0-1102.107USN-5343-1

linux-image-4.4.0-1103-kvmUbuntu

Fixed in:4.4.0-1103.112USN-5343-1

linux-image-4.4.0-1135-awsUbuntu

Fixed in:4.4.0-1135.149USN-5299-1

linux-image-4.4.0-1138-awsUbuntu

Fixed in:4.4.0-1138.152USN-5343-1

linux-image-4.4.0-219-genericUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-219.252USN-5299-1

linux-image-4.4.0-219-lowlatencyUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-219.252USN-5299-1

linux-image-4.4.0-222-genericUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-4.4.0-222-lowlatencyUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-5.10.0-1033-oemUbuntu

Fixed in:5.10.0-1033.34USN-5001-1

linux-image-5.4.0-1018-gkeopUbuntu

Fixed in:5.4.0-1018.19~18.04.1USN-5000-1

Fixed in:5.4.0-1018.19USN-5000-1

linux-image-5.4.0-1038-raspiUbuntu

Fixed in:5.4.0-1038.41~18.04.1USN-5000-1

Fixed in:5.4.0-1038.41USN-5000-1

linux-image-5.4.0-1041-kvmUbuntu

Fixed in:5.4.0-1041.42USN-5000-2

linux-image-5.4.0-1046-gcpUbuntu

Fixed in:5.4.0-1046.49~18.04.1USN-5000-1

Fixed in:5.4.0-1046.49USN-5000-1

linux-image-5.4.0-1046-gkeUbuntu

Fixed in:5.4.0-1046.48~18.04.1USN-5000-1

Fixed in:5.4.0-1046.48USN-5000-1

linux-image-5.4.0-1048-oracleUbuntu

Fixed in:5.4.0-1048.52~18.04.1USN-5000-1

Fixed in:5.4.0-1048.52USN-5000-1

linux-image-5.4.0-1051-awsUbuntu

Fixed in:5.4.0-1051.53~18.04.1USN-5000-1

Fixed in:5.4.0-1051.53USN-5000-1

linux-image-5.4.0-1051-azureUbuntu

Fixed in:5.4.0-1051.53~18.04.1USN-5000-1

Fixed in:5.4.0-1051.53USN-5000-1

linux-image-5.4.0-77-genericUbuntu

Fixed in:5.4.0-77.86~18.04.1USN-5000-1

Fixed in:5.4.0-77.86USN-5000-1

linux-image-5.4.0-77-generic-lpaeUbuntu

Fixed in:5.4.0-77.86~18.04.1USN-5000-1

Fixed in:5.4.0-77.86USN-5000-1

linux-image-5.4.0-77-lowlatencyUbuntu

Fixed in:5.4.0-77.86~18.04.1USN-5000-1

Fixed in:5.4.0-77.86USN-5000-1

linux-image-5.8.0-1033-oracleUbuntu

Fixed in:5.8.0-1033.34~20.04.1USN-4999-1

linux-image-5.8.0-1035-gcpUbuntu

Fixed in:5.8.0-1035.37~20.04.1USN-4999-1

linux-image-5.8.0-1036-azureUbuntu

Fixed in:5.8.0-1036.38~20.04.1USN-4999-1

linux-image-5.8.0-1038-awsUbuntu

Fixed in:5.8.0-1038.40~20.04.1USN-4999-1

linux-image-5.8.0-59-genericUbuntu

Fixed in:5.8.0-59.66~20.04.1USN-4999-1

linux-image-5.8.0-59-generic-64kUbuntu

Fixed in:5.8.0-59.66~20.04.1USN-4999-1

linux-image-5.8.0-59-generic-lpaeUbuntu

Fixed in:5.8.0-59.66~20.04.1USN-4999-1

linux-image-5.8.0-59-lowlatencyUbuntu

Fixed in:5.8.0-59.66~20.04.1USN-4999-1

linux-image-awsUbuntu

Fixed in:4.4.0.1102.100USN-5343-1

Fixed in:4.4.0.1099.97USN-5299-1

Fixed in:4.4.0.1138.143USN-5343-1

Fixed in:4.4.0.1135.140USN-5299-1

Fixed in:5.4.0.1051.33USN-5000-1

Fixed in:5.8.0.1038.40~20.04.11USN-4999-1

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1109.100USN-5018-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1109.112USN-5018-1

linux-image-aws-lts-20.04Ubuntu

Fixed in:5.4.0.1051.53USN-5000-1

linux-image-azureUbuntu

Fixed in:4.15.0.1121.94USN-5018-1

Fixed in:4.15.0.1121.112USN-5018-1

Fixed in:5.4.0.1051.30USN-5000-1

Fixed in:5.8.0.1036.38~20.04.8USN-4999-1

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1121.94USN-5018-1

linux-image-azure-lts-20.04Ubuntu

Fixed in:5.4.0.1051.49USN-5000-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1106.107USN-5018-1

Fixed in:5.4.0.1046.33USN-5000-1

Fixed in:5.8.0.1035.37~20.04.9USN-4999-1

linux-image-gcp-lts-18.04Ubuntu

Fixed in:4.15.0.1106.125USN-5018-1

linux-image-gcp-lts-20.04Ubuntu

Fixed in:5.4.0.1046.55USN-5000-1

linux-image-genericUbuntu

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.15.0.151.139USN-5018-1

Fixed in:5.4.0.77.80USN-5000-1

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

Fixed in:5.8.0.59.66~20.04.42USN-4999-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.151.146USN-5018-1

linux-image-generic-hwe-18.04Ubuntu

Fixed in:5.4.0.77.86~18.04.69USN-5000-1

linux-image-generic-hwe-20.04Ubuntu

Fixed in:5.8.0.59.66~20.04.42USN-4999-1

linux-image-generic-lpaeUbuntu

Fixed in:4.15.0.151.139USN-5018-1

Fixed in:5.4.0.77.80USN-5000-1

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

Fixed in:5.4.0.77.86~18.04.69USN-5000-1

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

Fixed in:5.8.0.59.66~20.04.42USN-4999-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

Fixed in:4.4.0.219.190USN-5299-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1106.107USN-5018-1

Fixed in:5.4.0.1046.55USN-5000-1

linux-image-gke-5.4Ubuntu

Fixed in:5.4.0.1046.48~18.04.12USN-5000-1

Fixed in:5.4.0.1046.55USN-5000-1

linux-image-gkeopUbuntu

Fixed in:5.4.0.1018.21USN-5000-1

linux-image-gkeop-5.4Ubuntu

Fixed in:5.4.0.1018.19~18.04.19USN-5000-1

Fixed in:5.4.0.1018.21USN-5000-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1103.101USN-5343-1

Fixed in:4.4.0.1100.98USN-5299-1

Fixed in:4.15.0.1097.93USN-5018-1

Fixed in:5.4.0.1041.39USN-5000-2

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.15.0.151.139USN-5018-1

Fixed in:5.4.0.77.80USN-5000-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.151.146USN-5018-1

linux-image-lowlatency-hwe-18.04Ubuntu

Fixed in:5.4.0.77.86~18.04.69USN-5000-1

linux-image-lowlatency-hwe-20.04Ubuntu

Fixed in:5.8.0.59.66~20.04.42USN-4999-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

Fixed in:4.4.0.219.190USN-5299-1

linux-image-oemUbuntu

Fixed in:4.15.0.151.146USN-5018-1

Fixed in:5.4.0.77.86~18.04.69USN-5000-1

Fixed in:5.4.0.77.80USN-5000-1

linux-image-oem-20.04Ubuntu

Fixed in:5.10.0.1033.34USN-5001-1

linux-image-oem-20.04bUbuntu

Fixed in:5.10.0.1033.34USN-5001-1

linux-image-oem-osp1Ubuntu

Fixed in:5.4.0.77.86~18.04.69USN-5000-1

Fixed in:5.4.0.77.80USN-5000-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1078.66USN-5018-1

Fixed in:5.4.0.1048.52~18.04.30USN-5000-1

Fixed in:5.8.0.1033.34~20.04.9USN-4999-1

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1078.88USN-5018-1

linux-image-oracle-lts-20.04Ubuntu

Fixed in:5.4.0.1048.48USN-5000-1

linux-image-raspiUbuntu

Fixed in:5.4.0.1038.73USN-5000-1

linux-image-raspi-hwe-18.04Ubuntu

Fixed in:5.4.0.1038.40USN-5000-1

linux-image-raspi2Ubuntu

Fixed in:4.15.0.1092.90USN-5018-1

Fixed in:5.4.0.1038.73USN-5000-1

linux-image-snapdragonUbuntu

Fixed in:4.15.0.1109.112USN-5018-1

linux-image-snapdragon-hwe-18.04Ubuntu

Fixed in:5.4.0.77.86~18.04.69USN-5000-1

linux-image-virtualUbuntu

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.15.0.151.139USN-5018-1

Fixed in:5.4.0.77.80USN-5000-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.151.146USN-5018-1

linux-image-virtual-hwe-18.04Ubuntu

Fixed in:5.4.0.77.86~18.04.69USN-5000-1

linux-image-virtual-hwe-20.04Ubuntu

Fixed in:5.8.0.59.66~20.04.42USN-4999-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.219.190USN-5299-1

Fixed in:4.4.0.222.193USN-5343-1

linux-kvmUbuntu

Fixed in:4.4.0-1103.112USN-5343-1

Fixed in:4.4.0-1100.109USN-5299-1

Fixed in:4.15.0-1097.99USN-5018-1

Fixed in:5.4.0-1041.42USN-5000-2

linux-lts-xenialUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

linux-oem-5.10Ubuntu

Fixed in:5.10.0-1033.34USN-5001-1

linux-oracleUbuntu

Fixed in:4.15.0-1078.86~16.04.1USN-5018-1

Fixed in:4.15.0-1078.86USN-5018-1

Fixed in:5.4.0-1048.52USN-5000-1

linux-oracle-5.4Ubuntu

Fixed in:5.4.0-1048.52~18.04.1USN-5000-1

linux-oracle-5.8Ubuntu

Fixed in:5.8.0-1033.34~20.04.1USN-4999-1

linux-raspiUbuntu

Fixed in:5.4.0-1038.41USN-5000-1

linux-raspi-5.4Ubuntu

Fixed in:5.4.0-1038.41~18.04.1USN-5000-1

linux-raspi2Ubuntu

Fixed in:4.15.0-1092.98USN-5018-1

linux-snapdragonUbuntu

Fixed in:4.15.0-1109.118USN-5018-1

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 VectorAdjacent

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

7.60%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Patch1

openwall.com

Third-Party Advisory6

Product1

fragattacks.com

Other references2

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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 2026-04-14.