CVE-2020-26147
CVE-2020-26147 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 5.4)
- CVSS v2: 3.2
- EPSS exploit prediction: 8% (94th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
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.
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 3.x base score of 5.4, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity high, and availability none.
- Is CVE-2020-26147 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-26147?
- CVE-2020-26147 primarily affects Linux Linux Kernel. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2020-26147?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-26147 published?
- CVE-2020-26147 was published on 2021-05-11 and last updated on 2026-06-17.
References
- http://www.openwall.com/lists/oss-security/2021/05/11/12
- https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf
- https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu
- https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63
- https://www.fragattacks.com
- https://cert-portal.siemens.com/productcert/html/ssa-019200.html
- https://cert-portal.siemens.com/productcert/html/ssa-913875.html
Affected products (8)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:arista:c-75_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:arista:o-90_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:arista:c-65_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:arista:w-68_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:scalance_w700_ieee_802.11n_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:scalance_w1700_ieee_802.11ac_firmware:*:*:*:*:*:*:*:*
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