---
id: CVE-2026-98178
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdgpu: Skip KFD mapping clear before initialization

  amdgpu_amdkfd_clear_kfd_mapping() assumes that a non-NULL kfd_dev
  has a fully populated node array
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdgpu: Skip KFD mapping clear before initialization

  amdgpu_amdkfd_clear_kfd_mapping() assumes that a non-NULL kfd_dev
  has a fully populated node array. This is no…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 70cadefcc6160c575b04f763ada34c20e868d577 <
    157d3f1db7e7e6f320daa221fae84a4c13555b6f
  - >-
    Linux >= 70cadefcc6160c575b04f763ada34c20e868d577 <
    7f9caa70aef0950e06d395ca0035831214d88187
  - Linux 7.2
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:17:59.930'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98178'
references:
  - url: 'https://git.kernel.org/stable/c/157d3f1db7e7e6f320daa221fae84a4c13555b6f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7f9caa70aef0950e06d395ca0035831214d88187'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98178.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98178'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2546471'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98178'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98178'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98178.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-10-06T08:50:17.452Z'
epss: 0.00155
epssPercentile: 0.04638
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-476
---

## Overview

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

drm/amdgpu: Skip KFD mapping clear before initialization

amdgpu_amdkfd_clear_kfd_mapping() assumes that a non-NULL kfd_dev
has a fully populated node array. This is not true when KFD device
initialization fails after probe.

For example, kgd2kfd_device_init() sets num_nodes before checking
PCIe atomics support. On Polaris systems without the required atomics,
it returns before allocating nodes[0], but the kfd_dev remains attached
to the amdgpu device. A later GPU reset then dereferences nodes[0]->id.

Require the authoritative KFD initialization flag before walking the
node array, matching the existing KFD reset and teardown paths.

(cherry picked from commit 4ac1835823c47903fbb278bbf474773c46f59edc)

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98178.json)