---
id: CVE-2026-98517
title: >-
  kernel: drm/nouveau/uvmm: fix UAF in nouveau_uvmm_sm when BO is in
  TTM_PL_SYSTEM (CVE-2026-98517)
summary: >-
  A flaw was found in the Linux kernel's Nouveau graphics driver. When handling
  buffer objects in system memory, the driver improperly accesses memory past
  the allocated resource boundary. A local attacker could exploit this flaw to
  cause a …
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-125
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T14:23:31+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98517.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98517.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98517'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554879'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98517'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98517'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98517.mbox
  - url: 'https://git.kernel.org/stable/c/34d9dffaf0ff43ac395a7955b3f7b5d9d6154bf3'
  - url: 'https://git.kernel.org/stable/c/1245b4b43da67596be61600dbd746539c79495ac'
  - url: 'https://git.kernel.org/stable/c/0d29bf51f8dddcf8556bf76710d3dd3024a1a717'
  - url: 'https://git.kernel.org/stable/c/5b2fffbba290ed74f381911b9986570bc10feaa4'
  - url: 'https://git.kernel.org/stable/c/3359a372efb6d585c97019ee1b7f1874442bcebe'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00164
epssPercentile: 0.05538
scores:
  vendor: 5.5
  cna: 7.8
ingestedAt: '2026-10-18T15:45:12.284Z'
---

## Overview

A flaw was found in the Linux kernel's Nouveau graphics driver. When handling buffer objects in system memory, the driver improperly accesses memory past the allocated resource boundary. A local attacker could exploit this flaw to cause a Denial of Service (DoS) through a kernel crash or potentially access sensitive kernel information.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98517.json)

**kernel: drm/nouveau/uvmm: fix UAF in nouveau_uvmm_sm when BO is in TTM_PL_SYSTEM** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-24.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Fix deferred