---
id: CVE-2026-43206
title: 'drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()

  The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8
  bytes via memset without checking the b…
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'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 <
    3e04bc310d80b46eaf481f1fefcbcb37a187412d
  - >-
    Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 <
    de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f
  - >-
    Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 <
    b4034442cb090e4a980bdcc1540948606cbc951b
  - >-
    Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 <
    4857c37c7ba9aa38b9a4c694e8bd8d0091c87940
  - >-
    Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 <
    75fb57efdd7863fffbc39db23e9cad7aafda26ed
  - >-
    Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 <
    bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b
  - >-
    Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 <
    4e72f419e4ed44cb3b60506752d8688c20a60a9b
  - >-
    Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 <
    8a70a26c9f34baea6c3199a9862ddaff4554a96d
  - Linux 4.17
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:15:43.887589Z'
published: '2026-05-06'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:20:36.526Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43206'
references:
  - url: 'https://git.kernel.org/stable/c/3e04bc310d80b46eaf481f1fefcbcb37a187412d'
  - url: 'https://git.kernel.org/stable/c/de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f'
  - url: 'https://git.kernel.org/stable/c/b4034442cb090e4a980bdcc1540948606cbc951b'
  - url: 'https://git.kernel.org/stable/c/4857c37c7ba9aa38b9a4c694e8bd8d0091c87940'
  - url: 'https://git.kernel.org/stable/c/75fb57efdd7863fffbc39db23e9cad7aafda26ed'
  - url: 'https://git.kernel.org/stable/c/bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b'
  - url: 'https://git.kernel.org/stable/c/4e72f419e4ed44cb3b60506752d8688c20a60a9b'
  - url: 'https://git.kernel.org/stable/c/8a70a26c9f34baea6c3199a9862ddaff4554a96d'
tags:
  - cve.org
epss: 0.00139
epssPercentile: 0.02894
ingestedAt: '2026-10-16T17:24:46.687Z'
---

## Overview

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

drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()

The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8
bytes via memset without checking the buffer size parameter. This allows
unprivileged userspace to trigger an out-of bounds kernel memory write
by passing a small buffer, leading to  potential privilege
escalation.

## Affected

- `Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 < 3e04bc310d80b46eaf481f1fefcbcb37a187412d`
- `Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 < de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f`
- `Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 < b4034442cb090e4a980bdcc1540948606cbc951b`
- `Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 < 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940`
- `Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 < 75fb57efdd7863fffbc39db23e9cad7aafda26ed`
- `Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 < bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b`
- `Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 < 4e72f419e4ed44cb3b60506752d8688c20a60a9b`
- `Linux >= 0fc8011f89feb8b2c3008583b777d097e1974660 < 8a70a26c9f34baea6c3199a9862ddaff4554a96d`
- `Linux 4.17`

## Remediation

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