---
id: CVE-2021-47028
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  mt76: mt7915: fix txrate reporting

  Properly check rate_info to fix unexpected reporting.

  [ 1215.161863] Call trace:
  [ 1215.164307]  cfg80211_calculate_bitrate+0x124/0…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  mt76: mt7915: fix txrate reporting

  Properly check rate_info to fix unexpected reporting.

  [ 1215.161863] Call trace:
  [ 1215.164307]  cfg80211_calculate_bitrate+0x124/0…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.8, < 5.11.21'
  - 'linux_kernel >= 5.12, < 5.12.4'
patched:
  - linux_kernel 5.12.4
published: '2024-02-28'
updated: '2026-08-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-47028'
references:
  - url: 'https://git.kernel.org/stable/c/4bd926e5ca88eac4d95eacb806b229f8729bc62e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dfc8a71448c7d4fec38fb22bdc8a76d79c14b6da'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f43b941fd61003659a3f0e039595e5e525917aa8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4bd926e5ca88eac4d95eacb806b229f8729bc62e'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/dfc8a71448c7d4fec38fb22bdc8a76d79c14b6da'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/f43b941fd61003659a3f0e039595e5e525917aa8'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47028.json
  - url: 'https://access.redhat.com/security/cve/CVE-2021-47028'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2266975'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2021-47028'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2021-47028'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2024022834-CVE-2021-47028-3a13@gregkh/T/#u
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00348
epssPercentile: 0.25694
ingestedAt: '2026-08-04T10:39:39.236Z'
cwe:
  - CWE-20
scores:
  nvd: 7.1
  vendor: 2.3
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

mt76: mt7915: fix txrate reporting

Properly check rate_info to fix unexpected reporting.

[ 1215.161863] Call trace:
[ 1215.164307]  cfg80211_calculate_bitrate+0x124/0x200 [cfg80211]
[ 1215.170139]  ieee80211s_update_metric+0x80/0xc0 [mac80211]
[ 1215.175624]  ieee80211_tx_status_ext+0x508/0x838 [mac80211]
[ 1215.181190]  mt7915_mcu_get_rx_rate+0x28c/0x8d0 [mt7915e]
[ 1215.186580]  mt7915_mac_tx_free+0x324/0x7c0 [mt7915e]
[ 1215.191623]  mt7915_queue_rx_skb+0xa8/0xd0 [mt7915e]
[ 1215.196582]  mt76_dma_cleanup+0x7b0/0x11d0 [mt76]
[ 1215.201276]  __napi_poll+0x38/0xf8
[ 1215.204668]  napi_workfn+0x40/0x80
[ 1215.208062]  process_one_work+0x1fc/0x390
[ 1215.212062]  worker_thread+0x48/0x4d0
[ 1215.215715]  kthread+0x120/0x128
[ 1215.218935]  ret_from_fork+0x10/0x1c

## Affected

- `linux_kernel >= 5.8, < 5.11.21`
- `linux_kernel >= 5.12, < 5.12.4`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.12.4`

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47028.json)