---
id: CVE-2021-46948
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  sfc: farch: fix TX queue lookup in TX event handling

  We're starting from a TXQ label, not a TXQ type, so
   efx_channel_get_tx_queue() is inappropriate (and could return…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  sfc: farch: fix TX queue lookup in TX event handling

  We're starting from a TXQ label, not a TXQ type, so
   efx_channel_get_tx_queue() is inappropriate (and could return…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.10.0, < 5.10.36'
  - 'linux_kernel >= 5.11.0, < 5.11.20'
  - 'linux_kernel >= 5.12.0, < 5.12.3'
patched:
  - linux_kernel 5.12.3
published: '2024-02-27'
updated: '2026-08-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-46948'
references:
  - url: 'https://git.kernel.org/stable/c/35c7a83ad1bb1d48ae249346e61b1132bcbf9052'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/83b09a1807415608b387c7bc748d329fefc5617e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bf2b941d0a6f2d3b9f5fa3c4c21bdd54f71ce253'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e531db1ea6f98c9612cb2de093a107c7eadfb96c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/35c7a83ad1bb1d48ae249346e61b1132bcbf9052'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/83b09a1807415608b387c7bc748d329fefc5617e'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/bf2b941d0a6f2d3b9f5fa3c4c21bdd54f71ce253'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/e531db1ea6f98c9612cb2de093a107c7eadfb96c'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00591
epssPercentile: 0.46087
ingestedAt: '2026-08-04T10:39:38.463Z'
---

## Overview

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

sfc: farch: fix TX queue lookup in TX event handling

We're starting from a TXQ label, not a TXQ type, so
 efx_channel_get_tx_queue() is inappropriate (and could return NULL,
 leading to panics).

## Affected

- `linux_kernel >= 5.10.0, < 5.10.36`
- `linux_kernel >= 5.11.0, < 5.11.20`
- `linux_kernel >= 5.12.0, < 5.12.3`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.12.3`