---
id: CVE-2021-47645
title: >-
  In the Linux kernel, the following vulnerability has been resolved:


  media: staging: media: zoran: calculate the right buffer number for
  zoran_reap_stat_com


  On the case tmp_dcim=1, the index of buffer is miscalculated.

  This generate a N…
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  media: staging: media: zoran: calculate the right buffer number for
  zoran_reap_stat_com


  On the case tmp_dcim=1, the index of buffer is miscalculated.

  This generate a N…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
  - CWE-476
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 5.10.110
  - 'linux_kernel >= 5.11, < 5.15.33'
  - 'linux_kernel >= 5.16, < 5.16.19'
  - 'linux_kernel >= 5.17, < 5.17.2'
patched:
  - linux_kernel 5.17.2
published: '2025-02-26'
updated: '2026-08-11'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-47645'
references:
  - url: 'https://git.kernel.org/stable/c/20811bbe685ca3eddd34b0c750860427d7030910'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/20db2ed1e2f9fcd417fa67853e5154f0c2537d6c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7e76f3ed7ab2ae026c6ef9cc23096a7554af8c52'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8dce4b265a5357731058f69645840dabc718c687'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bafec1a6ba4b187a7fcdcfce0faebdc623d4ef8e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00253
epssPercentile: 0.17086
ingestedAt: '2026-08-11T16:47:03.472Z'
---

## Overview

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

media: staging: media: zoran: calculate the right buffer number for zoran_reap_stat_com

On the case tmp_dcim=1, the index of buffer is miscalculated.
This generate a NULL pointer dereference later.

So let's fix the calcul and add a check to prevent this to reappear.

## Affected

- `linux_kernel < 5.10.110`
- `linux_kernel >= 5.11, < 5.15.33`
- `linux_kernel >= 5.16, < 5.16.19`
- `linux_kernel >= 5.17, < 5.17.2`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.17.2`