---
id: CVE-2026-23466
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/xe: Open-code GGTT MMIO access protection

  GGTT MMIO access is currently protected by hotplug (drm_dev_enter),
  which works correctly when the driver loads successfu…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/xe: Open-code GGTT MMIO access protection

  GGTT MMIO access is currently protected by hotplug (drm_dev_enter),
  which works correctly when the driver loads successfu…
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_kernel
affected:
  - 'linux_kernel >= 6.12, < 6.12.78'
  - 'linux_kernel >= 6.13, < 6.18.20'
  - 'linux_kernel >= 6.19, < 6.19.10'
  - linux_kernel = 7.0
patched:
  - linux_kernel 6.19.10
published: '2026-04-03'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-23466'
references:
  - url: 'https://git.kernel.org/stable/c/01f2557aa684e514005541e71a3d01f4cd45c170'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1e9e2640d870d4837bcfdc220cb2c99ae5ee119f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/76326dc06d8793c2c81c31cc0115dbc348de2f88'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e2b424aadecb640f9e037b2891191cf8fd4c64cf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23466.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-23466'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2454867'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-23466'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-23466'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026040321-CVE-2026-23466-ae2c@gregkh/T
  - url: 'https://access.redhat.com/errata/RHSA-2026:67150'
  - url: 'https://access.redhat.com/errata/RHSA-2026:67471'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00129
epssPercentile: 0.02081
ingestedAt: '2026-07-25T22:05:03.684Z'
cwe:
  - CWE-1220
scores:
  nvd: 7.8
  vendor: 5.5
---

## Overview

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

drm/xe: Open-code GGTT MMIO access protection

GGTT MMIO access is currently protected by hotplug (drm_dev_enter),
which works correctly when the driver loads successfully and is later
unbound or unloaded. However, if driver load fails, this protection is
insufficient because drm_dev_unplug() is never called.

Additionally, devm release functions cannot guarantee that all BOs with
GGTT mappings are destroyed before the GGTT MMIO region is removed, as
some BOs may be freed asynchronously by worker threads.

To address this, introduce an open-coded flag, protected by the GGTT
lock, that guards GGTT MMIO access. The flag is cleared during the
dev_fini_ggtt devm release function to ensure MMIO access is disabled
once teardown begins.

(cherry picked from commit 4f3a998a173b4325c2efd90bdadc6ccd3ad9a431)

## Affected

- `linux_kernel >= 6.12, < 6.12.78`
- `linux_kernel >= 6.13, < 6.18.20`
- `linux_kernel >= 6.19, < 6.19.10`
- `linux_kernel = 7.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.10`

## Vendor advisories

- **RHSA-2026:67150** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:67150)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 9 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23466.json)
- **RHSA-2026:67471** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), Red Hat Enterprise Linux Real Time (v. 10) · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67471)