---
id: CVE-2021-47048
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op

  When handling op->addr, it is using the buffer "tmpbuf" which has been
  freed
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op

  When handling op->addr, it is using the buffer "tmpbuf" which has been
  freed. This will trigger a use-…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.10, < 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-2021-47048'
references:
  - url: 'https://git.kernel.org/stable/c/1231279389b5e638bc3b66b9741c94077aed4b5a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/23269ac9f123eca3aea7682d3345c02e71ed696c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d67e0d6bd92ebbb0294e7062bbf5cdc773764e62'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1231279389b5e638bc3b66b9741c94077aed4b5a'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/23269ac9f123eca3aea7682d3345c02e71ed696c'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/d67e0d6bd92ebbb0294e7062bbf5cdc773764e62'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00238
epssPercentile: 0.13172
ingestedAt: '2026-08-04T10:39:39.567Z'
---

## Overview

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

spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op

When handling op->addr, it is using the buffer "tmpbuf" which has been
freed. This will trigger a use-after-free KASAN warning. Let's use
temporary variables to store op->addr.val and op->cmd.opcode to fix
this issue.

## Affected

- `linux_kernel >= 5.10, < 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`