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CVE-2026-89808

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram When migration vm range is hole at cpu side(MIGRATE_…

Published Sep 16, 2026EPSS 0.18%

Overview

CVE-2026-89808 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/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram

When migration vm range is hole at cpu side(MIGRATE_PFN_MIGRATE set +

MIGRATE_PFN_VALID unset) driver still allocates device pages. There is no

dma map of src pages and migration. j is 0 and svm_migrate_copy_memory_gart()

will return an uninitialized r. That can trigger out_free_vram_pages to drop

all VRAM just set up.

Initialize r and only call the last svm_migrate_copy_memory_gart if j > 0.

Current code postponed the last page to the final copy. This patch flushes on

the last page when reach to the end of current drm_buddy_block; avoids another

svm_migrate_copy_memory_gart.

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/0a9a0e8a97da70a0336c9115178aaf1be29bcfb1Refgit.kernel.org/stable/c/520e345ffe05aabef1db82beda4288afb1757ff2Refgit.kernel.org/stable/c/6e1a6f3ddb87d7f89a775c55fb399680c02bdcc2Refgit.kernel.org/stable/c/ae806a95b28fcecb913430cfa45a252e91a945d6Refgit.kernel.org/stable/c/bd1adb2e5101db649121b59e601c92773a302a70Refgit.kernel.org/stable/c/d5872c81c70163a3ba9eb4da9a94c92b03067576

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89808?

CVE-2026-89808 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-2026-89808?

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-2026-89808?

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-2026-89808?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89808 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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