---
id: CVE-2025-38187
title: 'drm/nouveau: fix a use-after-free in r535_gsp_rpc_push()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/nouveau: fix a use-after-free in r535_gsp_rpc_push()

  The RPC container is released after being passed to r535_gsp_rpc_send().

  When sending the initial fragment of…
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'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 176fdcbddfd288408ce8571c1760ad618d962096 <
    69270d24af7694494ac4116bcad30a812ca49ca7
  - >-
    Linux >= 176fdcbddfd288408ce8571c1760ad618d962096 <
    cd4677407c0ee250fc21e36439c8a442ddd62cc1
  - >-
    Linux >= 176fdcbddfd288408ce8571c1760ad618d962096 <
    9802f0a63b641f4cddb2139c814c2e95cb825099
  - Linux 6.7
published: '2025-07-04'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:36:49.089Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38187'
references:
  - url: 'https://git.kernel.org/stable/c/69270d24af7694494ac4116bcad30a812ca49ca7'
  - url: 'https://git.kernel.org/stable/c/cd4677407c0ee250fc21e36439c8a442ddd62cc1'
  - url: 'https://git.kernel.org/stable/c/9802f0a63b641f4cddb2139c814c2e95cb825099'
tags:
  - cve.org
epss: 0.00214
epssPercentile: 0.1166
ingestedAt: '2026-10-21T12:48:53.706Z'
---

## Overview

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

drm/nouveau: fix a use-after-free in r535_gsp_rpc_push()

The RPC container is released after being passed to r535_gsp_rpc_send().

When sending the initial fragment of a large RPC and passing the
caller's RPC container, the container will be freed prematurely. Subsequent
attempts to send remaining fragments will therefore result in a
use-after-free.

Allocate a temporary RPC container for holding the initial fragment of a
large RPC when sending. Free the caller's container when all fragments
are successfully sent.

[ Rebase onto Blackwell changes. - Danilo ]

## Affected

- `Linux >= 176fdcbddfd288408ce8571c1760ad618d962096 < 69270d24af7694494ac4116bcad30a812ca49ca7`
- `Linux >= 176fdcbddfd288408ce8571c1760ad618d962096 < cd4677407c0ee250fc21e36439c8a442ddd62cc1`
- `Linux >= 176fdcbddfd288408ce8571c1760ad618d962096 < 9802f0a63b641f4cddb2139c814c2e95cb825099`
- `Linux 6.7`

## Remediation

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