---
id: CVE-2021-47017
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ath10k: Fix a use after free in ath10k_htc_send_bundle

  In ath10k_htc_send_bundle, the bundle_skb could be freed by
  dev_kfree_skb_any(bundle_skb)
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ath10k: Fix a use after free in ath10k_htc_send_bundle

  In ath10k_htc_send_bundle, the bundle_skb could be freed by
  dev_kfree_skb_any(bundle_skb). But the bundle_skb is…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.8, < 5.10.37'
  - 'linux_kernel >= 5.11, < 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-2021-47017'
references:
  - url: 'https://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00339
epssPercentile: 0.24495
ingestedAt: '2026-08-04T10:39:39.207Z'
---

## Overview

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

ath10k: Fix a use after free in ath10k_htc_send_bundle

In ath10k_htc_send_bundle, the bundle_skb could be freed by
dev_kfree_skb_any(bundle_skb). But the bundle_skb is used later
by bundle_skb->len.

As skb_len = bundle_skb->len, my patch replaces bundle_skb->len to
skb_len after the bundle_skb was freed.

## Affected

- `linux_kernel >= 5.8, < 5.10.37`
- `linux_kernel >= 5.11, < 5.11.21`
- `linux_kernel >= 5.12, < 5.12.4`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.12.4`