---
id: CVE-2026-89873
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: v4l2-ctrls: validate HEVC EXT SPS RPS counts

  The HEVC SPS control carries the short-term and long-term RPS counts
  that decoder drivers use to walk the matching …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: v4l2-ctrls: validate HEVC EXT SPS RPS counts

  The HEVC SPS control carries the short-term and long-term RPS counts
  that decoder drivers use to walk the matching …
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
affected:
  - >-
    Linux >= c9a59dc2acc72789d5c778af080d1e65af84862c <
    30f85a7c59113a8844b276efc010085a34f912e9
  - >-
    Linux >= c9a59dc2acc72789d5c778af080d1e65af84862c <
    796b5c6d4f1615d59d5d8fe5a38fae6bfdfe878e
  - Linux 7.0
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:14.330'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89873'
references:
  - url: 'https://git.kernel.org/stable/c/30f85a7c59113a8844b276efc010085a34f912e9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/796b5c6d4f1615d59d5d8fe5a38fae6bfdfe878e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.987Z'
epss: 0.00165
epssPercentile: 0.05061
---

## Overview

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

media: v4l2-ctrls: validate HEVC EXT SPS RPS counts

The HEVC SPS control carries the short-term and long-term RPS counts
that decoder drivers use to walk the matching EXT SPS dynamic arrays.
Reject SPS values that exceed the HEVC limits of 64 short-term sets and
32 long-term references so drivers cannot later index beyond those
controls.

Also reject EXT SPS ST RPS entries whose negative or positive picture
counts exceed the 16-entry arrays, or whose combined delta-POC count
exceeds the HEVC DPB maximum.

## Remediation

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