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CVE-2026-89873

7.8 · HIGH

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 d…

Published Sep 16, 2026EPSS 0.17%

Overview

CVE-2026-89873 is a high-severity vulnerability. It was published on September 16, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/30f85a7c59113a8844b276efc010085a34f912e9Refgit.kernel.org/stable/c/796b5c6d4f1615d59d5d8fe5a38fae6bfdfe878e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89873?

CVE-2026-89873 is a high-severity vulnerability. It was published on September 16, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-89873?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-89873?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-89873?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89873 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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