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CVE-2026-89998

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: dm: fix race when loading and unloading a table If the userspace calls two concurrent table load ioctls and one of them succeed…

Published Sep 16, 2026EPSS 0.17%

Overview

CVE-2026-89998 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:

dm: fix race when loading and unloading a table

If the userspace calls two concurrent table load ioctls and one of them

succeeds and the other fails, there is a race condition because

dm_setup_md_queue walks &md->table_devices without any lock. If the walk

races with dm_table_destroy -> free_devices -> dm_put_table_device, there

is access to invalid memory.

Fix this race by extending the lock over the list walk.

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/00ad6f9ed27f91925d4d3fb7aab50a60d774f998Refgit.kernel.org/stable/c/0ea6e5ad4a5817e91f11b4cc1e022e575ed2e7caRefgit.kernel.org/stable/c/5380c7f6335cc6d77eb77d065105e81155c4d9d3Refgit.kernel.org/stable/c/a1af1884c960b98c621b6fe2fea1216b78c02152Refgit.kernel.org/stable/c/af1f32ccf8051f4691ced11feb452b9d13561727Refgit.kernel.org/stable/c/b02e35b81176c7d61dd441cc7a2e5c324a82444b

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89998?

CVE-2026-89998 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-2026-89998?

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-2026-89998?

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-2026-89998?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89998 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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