kernel: wifi frame payload being parsed incorrectly as an L2 frame
Published May 11, 2021
4.3
MEDIUMCVSS 3.1
EPSS 3.61%
Description
The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets.
Affected products
No data.
Configuration 1
- n/a
- n/a
Configuration 2
- n/a
- 20h2
- 1607
- 1803
- 1809
- 1909
- 2004
- n/a
- n/a
- n/a
- n/a
- r2
- n/a
- n/a
- n/a
- 2004
- n/a
Configuration 3
- 9.0
Configuration 4
- n/a
Running on/with
- n/a
Configuration 5
- n/a
Running on/with
- n/a
Configuration 6
- n/a
Running on/with
- n/a
Configuration 7
- n/a
Running on/with
- n/a
Configuration 8
- n/a
Running on/with
- n/a
Configuration 9
- n/a
Running on/with
- n/a
Configuration 10
- n/a
Running on/with
- n/a
Configuration 11
- n/a
Running on/with
- n/a
Configuration 12
- n/a
Running on/with
- n/a
Configuration 13
- n/a
Running on/with
- n/a
Configuration 14
- n/a
Running on/with
- n/a
Configuration 15
- n/a
Running on/with
- n/a
Configuration 16
- n/a
Running on/with
- n/a
Configuration 17
- n/a
Running on/with
- n/a
Configuration 18
- n/a
Running on/with
- n/a
Configuration 19
- n/a
Running on/with
- n/a
Configuration 20
- n/a
Running on/with
- n/a
Configuration 21
- n/a
Running on/with
- n/a
Configuration 22
- n/a
Running on/with
- n/a
Configuration 23
- n/a
Running on/with
- n/a
Configuration 24
- n/a
Running on/with
- n/a
Configuration 25
- n/a
Running on/with
- n/a
Configuration 26
- n/a
Running on/with
- n/a
Configuration 27
- n/a
Running on/with
- n/a
Configuration 28
- n/a
Running on/with
- n/a
Configuration 29
- n/a
Running on/with
- n/a
Configuration 30
- n/a
Running on/with
- n/a
Configuration 31
- n/a
Running on/with
- n/a
Configuration 32
- n/a
Running on/with
- n/a
Configuration 33
- n/a
Running on/with
- n/a
Configuration 34
- n/a
Running on/with
- n/a
Configuration 35
- n/a
Running on/with
- n/a
Configuration 36
- n/a
Running on/with
- n/a
Configuration 37
- n/a
Running on/with
- n/a
Configuration 38
- n/a
Configuration 39
- n/a
Configuration 40
- n/a
Configuration 41
- n/a
Configuration 42
- n/a
Configuration 43
- n/a
Configuration 44
- n/a
Configuration 45
- n/a
Configuration 46
- n/a
Configuration 47
- n/a
Configuration 48
- n/a
Configuration 49
- n/a
Configuration 50
- n/a
Configuration 51
- n/a
Configuration 52
- n/a
Configuration 53
- n/a
Configuration 54
- n/a
Configuration 55
- n/a
Configuration 56
- n/a
Configuration 57
- n/a
Configuration 58
- n/a
Configuration 59
- n/a
Running on/with
- n/a
Configuration 60
- n/a
Running on/with
- n/a
Configuration 61
- n/a
Running on/with
- n/a
Configuration 62
- n/a
Running on/with
- n/a
Configuration 63
- n/a
Running on/with
- n/a
Configuration 64
- n/a
Running on/with
- n/a
Configuration 65
- n/a
Running on/with
- n/a
Configuration 66
- n/a
Running on/with
- n/a
Configuration 67
- n/a
Running on/with
- n/a
Configuration 68
- n/a
Running on/with
- n/a
Configuration 69
- n/a
Running on/with
- n/a
Configuration 70
- n/a
Running on/with
- n/a
Configuration 71
- n/a
Running on/with
- n/a
Configuration 72
- n/a
Running on/with
- n/a
Configuration 73
- n/a
Running on/with
- n/a
Configuration 74
- n/a
Running on/with
- n/a
Configuration 75
- n/a
Running on/with
- n/a
Configuration 76
- n/a
Running on/with
- n/a
Configuration 77
- n/a
Running on/with
- n/a
Configuration 78
- n/a
Running on/with
- n/a
Configuration 79
- n/a
Running on/with
- n/a
Configuration 80
- n/a
Running on/with
- n/a
Configuration 81
- n/a
Running on/with
- n/a
Configuration 82
- n/a
Running on/with
- n/a
Configuration 83
- n/a
Running on/with
- n/a
Configuration 84
- n/a
Running on/with
- n/a
Configuration 85
- n/a
Running on/with
- n/a
Configuration 86
- n/a
Running on/with
- n/a
Configuration 87
- n/a
Running on/with
- n/a
Configuration 88
- n/a
Running on/with
- n/a
Configuration 89
- n/a
Running on/with
- n/a
Configuration 90
- n/a
Running on/with
- n/a
Configuration 91
- n/a
Running on/with
- n/a
Configuration 92
- n/a
Running on/with
- n/a
Configuration 93
- n/a
Running on/with
- n/a
Configuration 94
- n/a
Running on/with
- n/a
Configuration 95
- n/a
Running on/with
- n/a
Configuration 96
- n/a
Running on/with
- n/a
Configuration 97
- n/a
Running on/with
- n/a
Configuration 98
- n/a
Running on/with
- n/a
Configuration 99
- n/a
Running on/with
- n/a
Configuration 100
- n/a
Running on/with
- n/a
Configuration 101
- n/a
Running on/with
- n/a
Configuration 102
- n/a
Running on/with
- n/a
Configuration 103
- n/a
Running on/with
- n/a
Configuration 104
- n/a
Running on/with
- n/a
Configuration 105
- n/a
Running on/with
- n/a
Configuration 106
- n/a
Running on/with
- n/a
Configuration 107
- n/a
Running on/with
- n/a
Configuration 108
- n/a
Running on/with
- n/a
Configuration 109
- n/a
Running on/with
- n/a
Configuration 110
- n/a
Running on/with
- n/a
Configuration 111
- n/a
Running on/with
- n/a
Configuration 112
- n/a
Running on/with
- n/a
Configuration 113
- n/a
Running on/with
- n/a
Configuration 114
- n/a
Running on/with
- n/a
Configuration 115
- n/a
Running on/with
- n/a
Configuration 116
- n/a
Running on/with
- n/a
Configuration 117
- n/a
Running on/with
- n/a
Configuration 118
- n/a
Running on/with
- n/a
Configuration 119
- n/a
Running on/with
- n/a
Configuration 120
- n/a
Running on/with
- n/a
Configuration 121
- n/a
Running on/with
- n/a
Configuration 122
- n/a
Running on/with
- n/a
Configuration 123
- n/a
Running on/with
- n/a
Configuration 124
- n/a
Running on/with
- n/a
Configuration 125
- n/a
Running on/with
- n/a
Configuration 126
- n/a
Running on/with
- n/a
Configuration 127
- n/a
Running on/with
- n/a
Configuration 128
- n/a
Running on/with
- n/a
Configuration 129
- n/a
Running on/with
- n/a
Configuration 130
- n/a
Running on/with
- n/a
Configuration 131
- n/a
Running on/with
- n/a
Configuration 132
- n/a
Running on/with
- n/a
Configuration 133
- n/a
Running on/with
- n/a
Configuration 134
- n/a
Running on/with
- n/a
Configuration 135
- n/a
Running on/with
- n/a
Configuration 136
- n/a
Running on/with
- n/a
Configuration 137
- n/a
Running on/with
- n/a
Configuration 138
- n/a
Running on/with
- n/a
Configuration 139
- n/a
Running on/with
- n/a
Configuration 140
- n/a
Running on/with
- n/a
Configuration 141
- n/a
Running on/with
- n/a
Configuration 142
- n/a
Running on/with
- n/a
Configuration 143
- n/a
Running on/with
- n/a
Configuration 144
- n/a
Configuration 145
- n/a
Running on/with
- n/a
Configuration 146
- n/a
Running on/with
- n/a
Configuration 147
- n/a
Running on/with
- n/a
Configuration 148
- n/a
Running on/with
- n/a
Configuration 149
- n/a
Running on/with
- n/a
Configuration 150
- n/a
Running on/with
- n/a
Configuration 151
- n/a
Running on/with
- n/a
Configuration 152
- n/a
Running on/with
- n/a
Configuration 153
- n/a
Running on/with
- n/a
Configuration 154
- n/a
Running on/with
- n/a
Configuration 155
- n/a
Running on/with
- n/a
Configuration 156
- n/a
Running on/with
- n/a
Configuration 157
- n/a
Running on/with
- n/a
Configuration 158
- n/a
Running on/with
- n/a
Configuration 159
- n/a
Running on/with
- n/a
Configuration 160
- n/a
Running on/with
- n/a
Configuration 161
- n/a
Running on/with
- n/a
Configuration 162
- n/a
Configuration 163
- n/a
Configuration 164
- n/a
Configuration 165
- n/a
Configuration 166
- n/a
Running on/with
- n/a
Configuration 167
- n/a
Running on/with
- n/a
Configuration 168
- n/a
Running on/with
- n/a
Configuration 169
- n/a
Running on/with
- n/a
Configuration 170
- n/a
Running on/with
- n/a
Configuration 171
- n/a
Running on/with
- n/a
Configuration 172
- n/a
Running on/with
- n/a
Configuration 173
- n/a
Running on/with
- n/a
Configuration 174
- n/a
Running on/with
- n/a
Configuration 175
- n/a
Running on/with
- n/a
Configuration 176
- n/a
Running on/with
- n/a
Configuration 177
- n/a
Running on/with
- n/a
Configuration 178
- n/a
Running on/with
- n/a
Configuration 179
- n/a
Running on/with
- n/a
Configuration 180
Running on/with
- n/a
Configuration 181
- n/a
Running on/with
- n/a
Configuration 182
- n/a
Running on/with
- n/a
Configuration 183
- ≥ 4.4.0 · < 4.4.271
- ≥ 4.9.0 · < 4.9.271
- ≥ 4.14 · < 4.14.235
- ≥ 4.19 · < 4.19.193
- ≥ 5.4 · < 5.4.124
- ≥ 5.10 · < 5.10.42
- ≥ 5.12 · < 5.12.9
No data.
Red Hat Enterprise Linux 8
kernel-0:4.18.0-348.el8
Fixed · RHSA-2021:4356
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-348.rt7.130.el8
Fixed · RHSA-2021:4140
Red Hat Enterprise Linux 5
kernel
Out of support scope
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel-rt
Out of support scope
Red Hat Enterprise Linux 9
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-348.el8 | Fixed | RHSA-2021:4356 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-348.rt7.130.el8 | Fixed | RHSA-2021:4140 |
| Red Hat Enterprise Linux 5 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Out of support scope | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options does not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
1 other source (Red Hat) ▾
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
No CVSS v3.0 score for this CVE.
AV:A/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.61% (0.03611) | 89.12th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.54% (0.03537) | 87.73th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.19% (0.00195) | 38.60th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.91% (0.01914) | 72.34th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.15% (0.00149) | 32.83th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.38% (0.00381) | 73.81th | v3 (v2023.03.01) |
| Jul 12, 2024 | 0.35% (0.00352) | 72.15th | v3 (v2023.03.01) |
| May 28, 2024 | 0.25% (0.00248) | 64.78th | v3 (v2023.03.01) |
| Apr 16, 2024 | 0.21% (0.00214) | 59.09th | v3 (v2023.03.01) |
| Apr 2, 2024 | 0.22% (0.00224) | 60.05th | v3 (v2023.03.01) |
| Dec 16, 2023 | 0.21% (0.00214) | 59.35th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.15% (0.00151) | 49.44th | v3 (v2023.03.01) |
| Mar 6, 2023 | 10.11% (0.10114) | 94.55th | v2 (v2022.01.01) |
| Apr 1, 2022 | 10.11% (0.10114) | 94.08th | v2 (v2022.01.01) |
| Feb 4, 2022 | 27.54% (0.27536) | 95.91th | v2 (v2022.01.01) |
| Feb 3, 2022 | 52.01% (0.52005) | 99.06th | v1 |
| Jan 6, 2022 | 52.01% (0.52005) | 99.05th | v1 |
| Oct 29, 2021 | 19.45% (0.19452) | 97.85th | v1 |
| Sep 1, 2021 | 14.43% (0.14429) | 96.99th | v1 |
| Aug 10, 2021 | 14.43% (0.14429) | 0.00th | v1 |
| Jul 14, 2021 | 1.45% (0.01454) | 0.00th | v1 |
| Jun 23, 2021 | 1.25% (0.01247) | 0.00th | v1 |
| May 12, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (17)
- http://www.openwall.com/lists/oss-security/2021/05/11/12 mailing-listMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2020-24588 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1959657 Issue Tracking
- https://cert-portal.siemens.com/productcert/html/ssa-019200.html
- https://cert-portal.siemens.com/productcert/html/ssa-913875.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf Third Party Advisory
- https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html mailing-listMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html mailing-listMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html mailing-list
- https://lore.kernel.org/linux-wireless/20210511200110.25d93176ddaf.I9e265b597f2cd23eb44573f35b625947b386a9de@changeid/
- https://nvd.nist.gov/vuln/detail/CVE-2020-24588
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu vendor-advisoryThird Party Advisory
- https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2020-24588
- https://www.fragattacks.com ExploitThird Party Advisory
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00473.html Third Party Advisory
Change history (0)
No recorded changes yet.