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CVE-2026-89597

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: fbdev: uvesafb: unregister connector callback on init failure uvesafb_init() registers the v86d connector callback before regis…

Published Sep 11, 2026EPSS 0.17%

Overview

CVE-2026-89597 is a high-severity vulnerability. It was published on September 11, 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:

fbdev: uvesafb: unregister connector callback on init failure

uvesafb_init() registers the v86d connector callback before registering

the platform driver. If platform_driver_register() fails, the function

returns the error directly and leaves the connector callback registered.

The later platform-device failure path already unregisters the callback.

Add the same cleanup before the final return when platform-driver

registration fails.

This issue was identified during our ongoing static-analysis research while

reviewing kernel code.

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/0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7Refgit.kernel.org/stable/c/17518e7123f7ef01b1155064dc01f2087583908eRefgit.kernel.org/stable/c/466a8af0dee2cf745307155e26884e19a37b7e15Refgit.kernel.org/stable/c/9e768ae51426af2034d479133cfd73010d641b1aRefgit.kernel.org/stable/c/9eb7b3cbe99c9c0edbff69eb155c723e30983c22Refgit.kernel.org/stable/c/9f8a822b44c42502f105cf6574f4867067eecdd0Refgit.kernel.org/stable/c/b149f77d04082a9da75944cdc488becb0e35258fRefgit.kernel.org/stable/c/de8db23aa7c337e606fca9faf48b3ba72968597a

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89597?

CVE-2026-89597 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-89597?

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-2026-89597?

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-2026-89597?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89597 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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