---
id: CVE-2026-89808
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram

  When migration vm range is hole at cpu side(MIGRATE_PFN_MIGRATE set +
  MIGRATE_PFN_VALID unse…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram

  When migration vm range is hole at cpu side(MIGRATE_PFN_MIGRATE set +
  MIGRATE_PFN_VALID unse…
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'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    ae806a95b28fcecb913430cfa45a252e91a945d6
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    0a9a0e8a97da70a0336c9115178aaf1be29bcfb1
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    520e345ffe05aabef1db82beda4288afb1757ff2
  - Linux < 6.18.51
  - Linux < 7.2.5
  - Linux (all versions)
published: '2026-09-16'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T10:17:03.883'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89808'
references:
  - url: 'https://git.kernel.org/stable/c/0a9a0e8a97da70a0336c9115178aaf1be29bcfb1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/520e345ffe05aabef1db82beda4288afb1757ff2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ae806a95b28fcecb913430cfa45a252e91a945d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:54.007Z'
epss: 0.00161
epssPercentile: 0.05756
---

## Overview

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

drm/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram

When migration vm range is hole at cpu side(MIGRATE_PFN_MIGRATE set +
MIGRATE_PFN_VALID unset) driver still allocates device pages. There is no
dma map of src pages and migration. j is 0 and svm_migrate_copy_memory_gart()
will return an uninitialized r. That can trigger out_free_vram_pages to drop
all VRAM just set up.

Initialize r and only call the last svm_migrate_copy_memory_gart if j > 0.

Current code postponed the last page to the final copy. This patch flushes on
the last page when reach to the end of current drm_buddy_block; avoids another
svm_migrate_copy_memory_gart.

## Remediation

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