---
id: CVE-2023-52494
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bus: mhi: host: Add alignment check for event ring read pointer

  Though we do check the event ring read pointer by "is_valid_ring_ptr"
  to make sure it is in the buffer …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bus: mhi: host: Add alignment check for event ring read pointer

  Though we do check the event ring read pointer by "is_valid_ring_ptr"
  to make sure it is in the buffer …
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-787
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.13, < 5.15.149'
  - 'linux_kernel >= 5.16, < 6.1.76'
  - 'linux_kernel >= 6.2, < 6.6.15'
  - 'linux_kernel >= 6.7, < 6.7.3'
patched:
  - linux_kernel 6.7.3
published: '2024-03-11'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-52494'
references:
  - url: 'https://git.kernel.org/stable/c/2df39ac8f813860f79782807c3f7acff40b3c551'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/76ed0c6f6418cec6efe6f65a0b91f84be80b72eb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/94991728c84f8df54fd9eec9b85855ef9057ea08'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a9ebfc405fe1be145f414eafadcbf09506082010'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ecf8320111822a1ae5d5fc512953eab46d543d0b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/eff9704f5332a13b08fbdbe0f84059c9e7051d5f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2df39ac8f813860f79782807c3f7acff40b3c551'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/94991728c84f8df54fd9eec9b85855ef9057ea08'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/a9ebfc405fe1be145f414eafadcbf09506082010'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/ecf8320111822a1ae5d5fc512953eab46d543d0b'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/eff9704f5332a13b08fbdbe0f84059c9e7051d5f'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.0028
epssPercentile: 0.18246
ingestedAt: '2026-07-24T15:30:57.189Z'
---

## Overview

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

bus: mhi: host: Add alignment check for event ring read pointer

Though we do check the event ring read pointer by "is_valid_ring_ptr"
to make sure it is in the buffer range, but there is another risk the
pointer may be not aligned.  Since we are expecting event ring elements
are 128 bits(struct mhi_ring_element) aligned, an unaligned read pointer
could lead to multiple issues like DoS or ring buffer memory corruption.

So add a alignment check for event ring read pointer.

## Affected

- `linux_kernel >= 5.13, < 5.15.149`
- `linux_kernel >= 5.16, < 6.1.76`
- `linux_kernel >= 6.2, < 6.6.15`
- `linux_kernel >= 6.7, < 6.7.3`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.7.3`