---
id: CVE-2026-68255
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/virtio: bound EDID block reads to the response buffer

  virtio_get_edid_block() validates the read offset only against the
  device-supplied resp->size field, never ag…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/virtio: bound EDID block reads to the response buffer

  virtio_get_edid_block() validates the read offset only against the
  device-supplied resp->size field, never ag…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
published: '2026-08-10'
updated: '2026-08-23'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-68255'
references:
  - url: 'https://git.kernel.org/stable/c/2757e6e803092cf0aeaf4b735e16b5d3bdc705c5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/35be0e2c6862abcd5e5f5445261f1fd910d4a9b4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/375c1934ef0196d3b6d3a1eae3232bef8dae7bf7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3f506a85a905b080cadc029a1651a310479090a6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4e1a53892ba7f8a3e1da6bfc53c83ae7c812dccd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/64bedd2758eccbc74d39f7006a7ec16fa39dc901'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/65ce911f341ad8ff0c08922eff5bb6db75666eb0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9fc2a017c5d597937e0c28b9a9669844aa796c42'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.0019
epssPercentile: 0.07687
ingestedAt: '2026-08-23T13:48:06.820Z'
---

## Overview

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

drm/virtio: bound EDID block reads to the response buffer

virtio_get_edid_block() validates the read offset only against the
device-supplied resp->size field, never against the fixed-size resp->edid
array. The EDID block index is driven by the device-supplied extension
count, so a malicious virtio-gpu backend can advertise a large size
together with a high block count and read far past the array into adjacent
kernel memory, which is then surfaced in the parsed EDID (an out-of-bounds
read / info leak).

Also reject any read whose end exceeds the size of the edid array.
Conforming EDID responses stay within the array and are unaffected.

## Remediation

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