CVE-2020-26147
MEDIUMCVSS 5.4/10EPSS 7.60%
Last modified
CVE-2020-26147 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 7.60% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.4, < 4.4.271 |
| Linux | Linux Kernel | >= 4.9, < 4.9.271 |
| Linux | Linux Kernel | >= 4.14, < 4.14.235 |
| Linux | Linux Kernel | >= 4.19, < 4.19.193 |
| Linux | Linux Kernel | >= 5.4, < 5.4.124 |
| Linux | Linux Kernel | >= 5.10, < 5.10.42 |
| Linux | Linux Kernel | >= 5.12, < 5.12.9 |
| Debian | Debian Linux | 9.0 |
| Arista | C-75 Firmware | All versions |
| Arista | O-90 Firmware | All versions |
| Arista | C-65 Firmware | All versions |
| Arista | W-68 Firmware | All versions |
| Siemens | Scalance W700 Ieee 802.11n Firmware | All versions |
| Siemens | Scalance W1700 Ieee 802.11ac Firmware | All versions |
References
- http://www.openwall.com/lists/oss-security/2021/05/11/12Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdfThird Party Advisory
- https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.mdThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing List, Third Party Advisory
- https://www.fragattacks.comProduct
- http://www.openwall.com/lists/oss-security/2021/05/11/12Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdfThird Party Advisory
- https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.mdThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing List, Third Party Advisory
- https://www.fragattacks.comProduct
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-26147?
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 severe is CVE-2020-26147?
CVE-2020-26147 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 7.60% probability of exploitation in the next 30 days.
How do I fix CVE-2020-26147?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-26147?
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