---
id: CVE-2026-68107
title: 'drm/amdgpu/vcn4: avoid rereading IB param length'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdgpu/vcn4: avoid rereading IB param length

  Reuse the parameter length returned by
  vcn_v4_0_enc_find_ib_param() instead of rereading it from
  the IB.

  This avoids …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= cfdde9197ecd957281507be99af172671a57755c <
    bbbe6a2a8d8dc87243438d3ffea2083b52d882d9
  - >-
    Linux >= 6dc4eddeb7e6cca7e1ab32cafbda79d06e652d84 <
    ff6aa542d91d76a185f69bd1997b94a560ff5f6b
  - >-
    Linux >= 2b10cb58d7a3fd621ec9b2ba765a092e562ef998 <
    bd868c077f67589ed2a714307ceaade5f246e302
  - >-
    Linux >= 2b10cb58d7a3fd621ec9b2ba765a092e562ef998 <
    c309626bf91fa0a0b583575654e6e14e81f818a3
  - >-
    Linux >= 2b10cb58d7a3fd621ec9b2ba765a092e562ef998 <
    3b4082fabc67c9780b06eb959e59dd92fa79c0f0
  - Linux b1dc92f55b22a80ded8f0263c9ef4ba902303895
  - Linux >= 6.6.107 < 6.6.148
  - Linux >= 6.12.48 < 6.12.101
  - Linux >= 6.16.8 < 6.17
  - Linux 6.17
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:43:57.531323Z'
published: '2026-08-10'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:52:57.067Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68107'
references:
  - url: 'https://git.kernel.org/stable/c/bbbe6a2a8d8dc87243438d3ffea2083b52d882d9'
  - url: 'https://git.kernel.org/stable/c/ff6aa542d91d76a185f69bd1997b94a560ff5f6b'
  - url: 'https://git.kernel.org/stable/c/bd868c077f67589ed2a714307ceaade5f246e302'
  - url: 'https://git.kernel.org/stable/c/c309626bf91fa0a0b583575654e6e14e81f818a3'
  - url: 'https://git.kernel.org/stable/c/3b4082fabc67c9780b06eb959e59dd92fa79c0f0'
tags:
  - cve.org
epss: 0.00128
epssPercentile: 0.02204
ingestedAt: '2026-10-16T17:24:46.839Z'
---

## Overview

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

drm/amdgpu/vcn4: avoid rereading IB param length

Reuse the parameter length returned by
vcn_v4_0_enc_find_ib_param() instead of rereading it from
the IB.

This avoids a potential TOCTOU issue if the IB contents
change between reads.

(cherry picked from commit dbb02b4755f8c1f3773263f2d779872c1c0c073a)

## Affected

- `Linux >= cfdde9197ecd957281507be99af172671a57755c < bbbe6a2a8d8dc87243438d3ffea2083b52d882d9`
- `Linux >= 6dc4eddeb7e6cca7e1ab32cafbda79d06e652d84 < ff6aa542d91d76a185f69bd1997b94a560ff5f6b`
- `Linux >= 2b10cb58d7a3fd621ec9b2ba765a092e562ef998 < bd868c077f67589ed2a714307ceaade5f246e302`
- `Linux >= 2b10cb58d7a3fd621ec9b2ba765a092e562ef998 < c309626bf91fa0a0b583575654e6e14e81f818a3`
- `Linux >= 2b10cb58d7a3fd621ec9b2ba765a092e562ef998 < 3b4082fabc67c9780b06eb959e59dd92fa79c0f0`
- `Linux b1dc92f55b22a80ded8f0263c9ef4ba902303895`
- `Linux >= 6.6.107 < 6.6.148`
- `Linux >= 6.12.48 < 6.12.101`
- `Linux >= 6.16.8 < 6.17`
- `Linux 6.17`

## Remediation

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