---
id: CVE-2026-92495
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/bnxt_re: Clear VM_MAYWRITE on DBR/toggle page mmap

  bnxt_re_mmap() rejects VM_WRITE for the DBR_PAGE and TOGGLE_PAGE mmap
  flags, but a read-only mapping can still …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/bnxt_re: Clear VM_MAYWRITE on DBR/toggle page mmap

  bnxt_re_mmap() rejects VM_WRITE for the DBR_PAGE and TOGGLE_PAGE mmap
  flags, but a read-only mapping can still …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ea222485788208cd79bad42d25aae9232b33a934 <
    5361fb1e5bc246f9a2c0721543f72c8dac200769
  - >-
    Linux >= ea222485788208cd79bad42d25aae9232b33a934 <
    13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4
  - >-
    Linux >= ea222485788208cd79bad42d25aae9232b33a934 <
    0afbfe019c881483337d9f8304e678af05ebe7cc
  - >-
    Linux >= ea222485788208cd79bad42d25aae9232b33a934 <
    518df61b9b0a5b288dfa72c87246045329c18b8c
  - >-
    Linux >= ea222485788208cd79bad42d25aae9232b33a934 <
    9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16
  - Linux 6.6
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:51.670'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92495'
references:
  - url: 'https://git.kernel.org/stable/c/0afbfe019c881483337d9f8304e678af05ebe7cc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/13e7861809ef9e7e720ff5f0af1d4293a6d0a9b4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/518df61b9b0a5b288dfa72c87246045329c18b8c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5361fb1e5bc246f9a2c0721543f72c8dac200769'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9b66c9af7172ffcf727214fa0ebe9a5e1ed6eb16'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.784Z'
epss: 0.0021
epssPercentile: 0.09946
---

## Overview

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

RDMA/bnxt_re: Clear VM_MAYWRITE on DBR/toggle page mmap

bnxt_re_mmap() rejects VM_WRITE for the DBR_PAGE and TOGGLE_PAGE mmap
flags, but a read-only mapping can still retain VM_MAYWRITE. nd later
be upgraded with mprotect(PROT_WRITE). This can bypass the write check
that only runs at mmap time.

Clear VM_MAYWRITE before vm_insert_page() in the shared DBR/toggle-page
branch, matching the existing policy that userspace writes are not
expected for these pages.

## Remediation

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