mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report (CVE-2021-47135) | HOL Guard CVE

High · CVSS 7.8CVE-2021-47135

mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report

Answer in brief

CVE-2021-47135 records a High severity (CVSS 7.8) vulnerability in mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 15, 2024Updated Aug 4, 2026Source checked Aug 4, 2026First seen by HOL Aug 4, 2026Material review Aug 4, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 7 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc2::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc3::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc4::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1c099ab44727c8e42fe4de4d91b53cec3ef02860 <6919e8a24e70b6ba148fe07f44f835bcdd1a8d02 \|\| >=1c099ab44727c8e42fe4de4d91b53cec3ef02860 <d874e6c06952382897d35bf4094193cd44ae91bd	6919e8a24e70b6ba148fe07f44f835bcdd1a8d02, d874e6c06952382897d35bf4094193cd44ae91bd
Linux/Linuxgeneric	5.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 6919e8a24e70b6ba148fe07f44f835bcdd1a8d02 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Mar 15, 2024
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 4, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report Fix possible array out of bound access in mt7921_mcu_tx_rate_report. Remove unnecessary varibable in mt7921_mcu_tx_rate_report

Quoted source text, attributed separately from HOL analysis.

Back to active CVEs

High · CVSS 7.8CVE-2021-47135

mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report

Answer in brief

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 15, 2024Updated Aug 4, 2026Source checked Aug 4, 2026First seen by HOL Aug 4, 2026Material review Aug 4, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 7 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc2::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc3::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:5.13:rc4::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1c099ab44727c8e42fe4de4d91b53cec3ef02860 <6919e8a24e70b6ba148fe07f44f835bcdd1a8d02 \|\| >=1c099ab44727c8e42fe4de4d91b53cec3ef02860 <d874e6c06952382897d35bf4094193cd44ae91bd	6919e8a24e70b6ba148fe07f44f835bcdd1a8d02, d874e6c06952382897d35bf4094193cd44ae91bd
Linux/Linuxgeneric	5.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 6919e8a24e70b6ba148fe07f44f835bcdd1a8d02 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Mar 15, 2024
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 4, 2026

Sources and claim methodology

Upstream source description

Quoted source text, attributed separately from HOL analysis.

mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report

Key facts

Why this deserves its current priority

Affected scope and exposure questions

Recommended response

Evidence timeline and material changes

Sources and claim methodology

Related CVEs

mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report

Key facts

Why this deserves its current priority

Affected scope and exposure questions

Recommended response

Evidence timeline and material changes

Sources and claim methodology

Related CVEs