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.
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorAdjacent
ComplexityHigh
RequirementsPresent
PrivilegesNone
User InteractionActive
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityLow
IntegrityHigh
AvailabilityNone
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | PoC | E: U→P | 1.9 → 4.8 |
| 2026-07-21 | nvd | AV: P→A, PR: H→N, VC: N→L, VI: N→H | 0.0 → 1.9 |
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 0.0 → 0.0 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| arista | c-65_firmware | All versions |
| arista | c-75_firmware | All versions |
| arista | o-90_firmware | All versions |
| arista | w-68_firmware | All versions |
| debian | debian_linux | 9.0 |
| 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 |
| siemens | scalance_w1700_ieee_802.11ac_firmware | All versions |
| siemens | scalance_w700_ieee_802.11n_firmware | All versions |
Published: 2021-05-11
