Go to homepageCyberStrike

Menu

Star on GitHub · 3.4k
Sign inDownload

CVE-2026-89823

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm: fix race between partial drm_dev_register() failure and ioctl If drm_dev_register() fails after registering a minor (e.g.

Published Sep 16, 2026EPSS 0.17%

Overview

CVE-2026-89823 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:

drm: fix race between partial drm_dev_register() failure and ioctl

If drm_dev_register() fails after registering a minor (e.g. render minor

registered, primary minor fails), userspace could have opened the first

minor and entered a drm_dev_enter() critical section. Since the

unplugged flag was never set, the ioctl proceeds while the error path

tears down device resources.

Fix this by introducing drm_dev_synchronize_unplug(), which sets the

unplugged flag and waits for the SRCU barrier, ensuring all in-flight

drm_dev_enter() critical sections complete before cleanup proceeds; call

it on the error path of drm_dev_register().

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/19dbfe4d586aecfed121cb3fa62281761d9d341fRefgit.kernel.org/stable/c/24d28d15c0f7f7d4a1c229f8730314f0f8758810Refgit.kernel.org/stable/c/26d9162213952927cd59c0d94b7e0e992b347becRefgit.kernel.org/stable/c/2d1215a72159d00001e08dee162e27718934bee9Refgit.kernel.org/stable/c/6729990df9e70623bf53f855b521ae71ca9cb278Refgit.kernel.org/stable/c/79d09cfe90304ff4f195e47d569800f5e0f8b854Refgit.kernel.org/stable/c/a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22cRefgit.kernel.org/stable/c/eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89823?

CVE-2026-89823 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-2026-89823?

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-2026-89823?

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-2026-89823?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89823 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.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999
Watch the demo →