---
id: CVE-2026-46197
title: 'drm/amdkfd: validate SVM ioctl nattr against buffer size'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdkfd: validate SVM ioctl nattr against buffer size

  Validate nattr field against the buffer size, preventing
  out-of-bounds buffer access via user-controlled attri…
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 >= 42de677f79999791bee4e21be318c32d90ab62c6 <
    daa8bc5f83814b55b71d2b5b3a090d57a5219c21
  - >-
    Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 <
    fb07a0c9c8419164812e07274947f11b1d92dd61
  - >-
    Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 <
    91c6dc5a41695d02dfc6299f106ac38a6c493e52
  - >-
    Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 <
    ccd060b5c7cc75ae7e211c250b97c5b6272e7efc
  - >-
    Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 <
    db9530a9873a7c85d2266a922589ebcf427fa631
  - >-
    Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 <
    6abd3a4417cb73a7d0db7e25bf11fae1074bdba3
  - >-
    Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 <
    045e0ff208f0838a246c10204105126611b267a1
  - Linux 5.14
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:20:59.237887Z'
published: '2026-05-28'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:31:07.454Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-46197'
references:
  - url: 'https://git.kernel.org/stable/c/daa8bc5f83814b55b71d2b5b3a090d57a5219c21'
  - url: 'https://git.kernel.org/stable/c/fb07a0c9c8419164812e07274947f11b1d92dd61'
  - url: 'https://git.kernel.org/stable/c/91c6dc5a41695d02dfc6299f106ac38a6c493e52'
  - url: 'https://git.kernel.org/stable/c/ccd060b5c7cc75ae7e211c250b97c5b6272e7efc'
  - url: 'https://git.kernel.org/stable/c/db9530a9873a7c85d2266a922589ebcf427fa631'
  - url: 'https://git.kernel.org/stable/c/6abd3a4417cb73a7d0db7e25bf11fae1074bdba3'
  - url: 'https://git.kernel.org/stable/c/045e0ff208f0838a246c10204105126611b267a1'
tags:
  - cve.org
epss: 0.00176
epssPercentile: 0.06638
ingestedAt: '2026-10-16T17:24:46.711Z'
---

## Overview

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

drm/amdkfd: validate SVM ioctl nattr against buffer size

Validate nattr field against the buffer size, preventing
out-of-bounds buffer access via user-controlled attribute count.

(cherry picked from commit 5eca8bfdfa456c3304ca77523718fe24254c172f)

## Affected

- `Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 < daa8bc5f83814b55b71d2b5b3a090d57a5219c21`
- `Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 < fb07a0c9c8419164812e07274947f11b1d92dd61`
- `Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 < 91c6dc5a41695d02dfc6299f106ac38a6c493e52`
- `Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 < ccd060b5c7cc75ae7e211c250b97c5b6272e7efc`
- `Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 < db9530a9873a7c85d2266a922589ebcf427fa631`
- `Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 < 6abd3a4417cb73a7d0db7e25bf11fae1074bdba3`
- `Linux >= 42de677f79999791bee4e21be318c32d90ab62c6 < 045e0ff208f0838a246c10204105126611b267a1`
- `Linux 5.14`

## Remediation

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