CVE-2020-26147

MEDIUM

5.4

CVSS Score

Published: May 11, 2021 at 07:40 PM UTC

Updated: June 17, 2026 at 03:07 AM UTC

39 products affected across 4 vendorsLinux KernelDebian LinuxScalance W700 Ieee 802.11n Firmware

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Severity

MEDIUM5.4

Exploit prediction

EPSS 8%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

C 65 Firmware · Arista

95%

All versions

arista-c-65 (same device)

C 75 Firmware · Arista

95%

All versions

arista-c-75 (same device)

O 90 Firmware · Arista

95%

All versions

arista-o-90 (same device)

W 68 Firmware · Arista

95%

All versions

arista-w-68 (same device)

Debian Linux · Debiandrupal

95%

9.0

Linux Kernel · Linux

95%

4.14 ≤ v < 4.14.2354.19 ≤ v < 4.19.1934.4 ≤ v < 4.4.2714.9 ≤ v < 4.9.2715.10 ≤ v < 5.10.425.12 ≤ v < 5.12.95.4 ≤ v < 5.4.124

Affected range stops below 4.14.235, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.19.193, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.4.271, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.9.271, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.10.42, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.12.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.4.124, so it looks safe — our inference, not a vendor statement

Scalance W1700 Ieee 802.11ac Firmware · Siemens

95%

All versions

siemens-scalance-w1700-ieee-802-11ac (same device)

Scalance W700 Ieee 802.11n Firmware · Siemens

95%

All versions

siemens-scalance-w700-ieee-802-11n (same device)

SCALANCE W1748-1 M12 · Siemens

60%

v < V3.0.0

Affected range stops below V3.0.0, so it looks safe — our inference, not a vendor statement

SCALANCE W1788-1 M12 · Siemens

60%

v < V3.0.0

Affected range stops below V3.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (10)

Mailing Listx_refsource_MLISTPatchThird Party Advisory

Source: [email protected]

http://www.openwall.com/lists/oss-security/2021/05/11/12

x_refsource_CONFIRMThird Party Advisory

Source: [email protected]

https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf

x_refsource_MISCThird Party Advisory

Source: [email protected]

https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md

Mailing Listx_refsource_MLISTThird Party Advisory

Source: [email protected]

https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

Mailing Listx_refsource_MLISTThird Party Advisory

Source: [email protected]

https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

Vendor Advisoryx_refsource_CISCOThird Party Advisory

Source: [email protected]

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu

x_refsource_MISCThird Party Advisory

Source: [email protected]

https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63

x_refsource_MISCProduct

Source: [email protected]

https://www.fragattacks.com

CVSS

5.4MEDIUM[email protected]

Attack Vector: ADJACENT_NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: LOW
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-Other

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