Security readout for executives and security teams
This is a Wi-Fi fragmentation flaw in Linux kernel 5.8.9 handling. Some encrypted Wi-Fi implementations may wrongly reassemble plaintext fragments, creating a path for packet injection or limited fragment exfiltration under specific wireless conditions. Exposure is most relevant to Linux-based Wi-Fi clients, access points, or embedded products using affected kernel or vendor implementations. The bundle names Linux kernel 5.8.9 and includes Cisco, Debian, Siemens, and Arista advisories, but does not provide a complete affected-product list. Treat this as a targeted wireless exposure issue, not an internet-wide emergency. Prioritize patch verification for managed Wi-Fi infrastructure, Linux wireless endpoints, and embedded devices from vendors referenced in advisories. Mitigation focus: Apply applicable Linux kernel and vendor firmware/security updates.; Check Cisco, Debian, Siemens, and Arista advisories for product-specific guidance.; Prioritize managed Wi-Fi infrastructure and Linux-based wireless endpoints..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2020-26147 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- 20210511 Multiple Vulnerabilities in Frame Aggregation and Fragmentation Implementations of 802.11 Specification Affecting Cisco Products: May 2021CVE reference · vendor-advisory, x_refsource_CISCO
- https://www.fragattacks.com/CVE reference · x_refsource_MISC
- https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.mdCVE reference · x_refsource_MISC
- [debian-lts-announce] 20210623 [SECURITY] [DLA 2689-1] linux security updateCVE reference · mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20210623 [SECURITY] [DLA 2690-1] linux-4.19 security updateCVE reference · mailing-list, x_refsource_MLIST
- https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdfCVE reference · x_refsource_CONFIRM
- https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63CVE reference · x_refsource_MISC
- https://cert-portal.siemens.com/productcert/html/ssa-913875.htmlCVE reference
- https://cert-portal.siemens.com/productcert/html/ssa-019200.htmlCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.