---
id: CVE-2023-52464
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  EDAC/thunderx: Fix possible out-of-bounds string access

  Enabling -Wstringop-overflow globally exposes a warning for a common bug
  in the usage of strncat():

    drivers/…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  EDAC/thunderx: Fix possible out-of-bounds string access

  Enabling -Wstringop-overflow globally exposes a warning for a common bug
  in the usage of strncat():

    drivers/…
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-119
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.12.0, < 4.19.306'
  - 'linux_kernel >= 4.20.0, < 5.4.268'
  - 'linux_kernel >= 5.5.0, < 5.10.209'
  - 'linux_kernel >= 5.11.0, < 5.15.148'
  - 'linux_kernel >= 5.16.0, < 6.1.75'
  - 'linux_kernel >= 6.2.0, < 6.6.14'
  - 'linux_kernel >= 6.7.0, < 6.7.2'
patched:
  - linux_kernel 6.7.2
published: '2024-02-23'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:17:14.287'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-52464'
references:
  - url: 'https://git.kernel.org/stable/c/426fae93c01dffa379225eb2bd4d3cdc42c6eec5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/475c58e1a471e9b873e3e39958c64a2d278275c8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5da3b6e7196f0b4f3728e4e25eb20233a9ddfaf6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6aa7865ba7ff7f0ede0035180fb3b9400ceb405a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/700cf4bead80fac994dcc43ae1ca5d86d8959b21'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/71c17ee02538802ceafc830f0736aa35b564e601'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9dbac9fdae6e3b411fc4c3fca3bf48f70609c398'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e1c86511241588efffaa49556196f09a498d5057'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/426fae93c01dffa379225eb2bd4d3cdc42c6eec5'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/475c58e1a471e9b873e3e39958c64a2d278275c8'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/5da3b6e7196f0b4f3728e4e25eb20233a9ddfaf6'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/6aa7865ba7ff7f0ede0035180fb3b9400ceb405a'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/700cf4bead80fac994dcc43ae1ca5d86d8959b21'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/71c17ee02538802ceafc830f0736aa35b564e601'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/9dbac9fdae6e3b411fc4c3fca3bf48f70609c398'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/e1c86511241588efffaa49556196f09a498d5057'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00266
epssPercentile: 0.18386
ingestedAt: '2026-10-15T03:30:12.641Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-02-23T18:16:12.525994Z'
---

## Overview

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

EDAC/thunderx: Fix possible out-of-bounds string access

Enabling -Wstringop-overflow globally exposes a warning for a common bug
in the usage of strncat():

  drivers/edac/thunderx_edac.c: In function 'thunderx_ocx_com_threaded_isr':
  drivers/edac/thunderx_edac.c:1136:17: error: 'strncat' specified bound 1024 equals destination size [-Werror=stringop-overflow=]
   1136 |                 strncat(msg, other, OCX_MESSAGE_SIZE);
        |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   ...
   1145 |                                 strncat(msg, other, OCX_MESSAGE_SIZE);
   ...
   1150 |                                 strncat(msg, other, OCX_MESSAGE_SIZE);

   ...

Apparently the author of this driver expected strncat() to behave the
way that strlcat() does, which uses the size of the destination buffer
as its third argument rather than the length of the source buffer. The
result is that there is no check on the size of the allocated buffer.

Change it to strlcat().

  [ bp: Trim compiler output, fixup commit message. ]

## Affected

- `linux_kernel >= 4.12.0, < 4.19.306`
- `linux_kernel >= 4.20.0, < 5.4.268`
- `linux_kernel >= 5.5.0, < 5.10.209`
- `linux_kernel >= 5.11.0, < 5.15.148`
- `linux_kernel >= 5.16.0, < 6.1.75`
- `linux_kernel >= 6.2.0, < 6.6.14`
- `linux_kernel >= 6.7.0, < 6.7.2`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.7.2`