---
id: CVE-2026-72495
title: 'RDMA/bnxt_re: Avoid repeated requests to allocate WC pages'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/bnxt_re: Avoid repeated requests to allocate WC pages

  Applications can request multiple WC pages for the same ucontext.
  As of now, only 1 WC page per ucontext is …
severity: critical
cvss: 9.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-770
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 <
    8e59bd37d6d63a06ed452eaffe6c9d4ad903af7b
  - >-
    Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 <
    00c71846874fea4917961236e49287a1850dcf98
  - >-
    Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 <
    478c4d24193fe3e6aa2accd4874ae43000e4a217
  - >-
    Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 <
    da406b8b49c1dfe661a497483940d7ee781430db
  - >-
    Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 <
    441baa79043431807115fd030d7d0bb14ed441a0
  - Linux 6.5
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:51:00.430753Z'
published: '2026-08-15'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:45:04.330Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72495'
references:
  - url: 'https://git.kernel.org/stable/c/8e59bd37d6d63a06ed452eaffe6c9d4ad903af7b'
  - url: 'https://git.kernel.org/stable/c/00c71846874fea4917961236e49287a1850dcf98'
  - url: 'https://git.kernel.org/stable/c/478c4d24193fe3e6aa2accd4874ae43000e4a217'
  - url: 'https://git.kernel.org/stable/c/da406b8b49c1dfe661a497483940d7ee781430db'
  - url: 'https://git.kernel.org/stable/c/441baa79043431807115fd030d7d0bb14ed441a0'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72495.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-72495'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2516310'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-72495'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72495'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026081539-CVE-2026-72495-d1ba@gregkh/T
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00196
epssPercentile: 0.09189
scores:
  cna: 9.3
  vendor: 5.5
ingestedAt: '2026-10-16T19:46:24.390Z'
---

## Overview

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

RDMA/bnxt_re: Avoid repeated requests to allocate WC pages

Applications can request multiple WC pages for the same ucontext.
As of now, only 1 WC page per ucontext is supported. Add a lock to
avoid concurrent access and a check to fail repeated requests.
Also, if the mmap entry insert fails for the WC, free the Doorbell
page index mapped for the WC page.

## Affected

- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 8e59bd37d6d63a06ed452eaffe6c9d4ad903af7b`
- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 00c71846874fea4917961236e49287a1850dcf98`
- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 478c4d24193fe3e6aa2accd4874ae43000e4a217`
- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < da406b8b49c1dfe661a497483940d7ee781430db`
- `Linux >= 360da60d6c6edb9740de7a8e6d8969d62ceff956 < 441baa79043431807115fd030d7d0bb14ed441a0`
- `Linux 6.5`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72495.json)