---
id: CVE-2022-49743
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ovl: Use "buf" flexible array for memcpy() destination

  The "buf" flexible array needs to be the memcpy() destination to avoid
  false positive run-time warning from the …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ovl: Use "buf" flexible array for memcpy() destination

  The "buf" flexible array needs to be the memcpy() destination to avoid
  false positive run-time warning from the …
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'
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 5.15.93
  - 'linux_kernel >= 5.16, < 6.1.11'
patched:
  - linux_kernel 6.1.11
published: '2025-03-27'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:17:24.880'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-49743'
references:
  - url: 'https://git.kernel.org/stable/c/012cdef22000f3104e4fa8224ad29fde509b8caf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/07a96977b2f462337a9121302de64277b8747ab1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a77141a06367825d639ac51b04703d551163e36c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cf8aa9bf97cadf85745506c6a3e244b22c268d63'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00452
epssPercentile: 0.39082
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-15T21:18:12.828083Z'
ingestedAt: '2026-10-15T21:45:11.287Z'
---

## Overview

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

ovl: Use "buf" flexible array for memcpy() destination

The "buf" flexible array needs to be the memcpy() destination to avoid
false positive run-time warning from the recent FORTIFY_SOURCE
hardening:

  memcpy: detected field-spanning write (size 93) of single field "&fh->fb"
  at fs/overlayfs/export.c:799 (size 21)

## Affected

- `linux_kernel < 5.15.93`
- `linux_kernel >= 5.16, < 6.1.11`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.1.11`