---
id: CVE-2026-90416
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs

  get_param() reads a congestion parameter as a u32 but formats it with the
  signed "%d" into an 11-byte stac…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs

  get_param() reads a congestion parameter as a u32 but formats it with the
  signed "%d" into an 11-byte stac…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 <
    1c5b4f76cd73372c5a8a4c91c95d5a31f141e091
  - >-
    Linux >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 <
    06b62758f81e27ca4c81201c22e3436c6d9ac894
  - >-
    Linux >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 <
    d809cf3f0ed9255abfc73c4730bcf187151422af
  - >-
    Linux >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 <
    0b0122fcc923a0271130f5fb71af2cd7e20434d9
  - >-
    Linux >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 <
    ce8dfd32a33b578c3abf178f67b4c8d36854f041
  - >-
    Linux >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 <
    4599311e78e88c893ad551aca622de2bfdf1c31f
  - >-
    Linux >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 <
    c75ee076fa09778a2f9602a972dade4a0b0785f7
  - >-
    Linux >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 <
    03826bc1fa6c90405bf05831f2b501a8368dcd27
  - Linux 4.14
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:45.880'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90416'
references:
  - url: 'https://git.kernel.org/stable/c/03826bc1fa6c90405bf05831f2b501a8368dcd27'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/06b62758f81e27ca4c81201c22e3436c6d9ac894'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/0b0122fcc923a0271130f5fb71af2cd7e20434d9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1c5b4f76cd73372c5a8a4c91c95d5a31f141e091'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4599311e78e88c893ad551aca622de2bfdf1c31f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c75ee076fa09778a2f9602a972dade4a0b0785f7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ce8dfd32a33b578c3abf178f67b4c8d36854f041'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d809cf3f0ed9255abfc73c4730bcf187151422af'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.797Z'
epss: 0.0022
epssPercentile: 0.11049
---

## Overview

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

RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs

get_param() reads a congestion parameter as a u32 but formats it with the
signed "%d" into an 11-byte stack buffer. A value with bit 31 set, such as
0x80000000, renders as "-2147483648\n" whose full length is 12. snprintf()
stores only 11 bytes yet returns 12, so simple_read_from_buffer() treats 12
bytes as valid and reads one byte past lbuf[].

Size the buffer for the widest unsigned decimal, format with "%u" to match
the u32, and use scnprintf() so the length passed to
simple_read_from_buffer() reflects the bytes actually stored.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.