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CVE-2026-64152

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: iommu: Handle unmap error when iommu_debug is enabled Sashiko noticed a latent bug where the map error flow called iommu_unmap(…

Published Jul 19, 2026EPSS 0.14%

Overview

CVE-2026-64152 is a high-severity vulnerability. It was published on July 19, 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:

iommu: Handle unmap error when iommu_debug is enabled

Sashiko noticed a latent bug where the map error flow called iommu_unmap()

which calls iommu_debug_unmap_begin()/iommu_debug_unmap_end() however

since this is an error path the map flow never actually established the

original iommu_debug_map() it will malfunction.

Lift the unmap error handling into iommu_map_nosync() and reorder it so

the trace_map()/iommu_debug_map() records the partial mapping and then

immediately unmaps it. This avoid creating the unbalanced tracking and

provides saner tracing instead of a unmap unmatched to any map.

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/0735c54804c709d1b292f3b6947cfb560b2ce552Refgit.kernel.org/stable/c/0cd028806efc148a75d4acf711d21db335a89661

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64152?

CVE-2026-64152 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-64152?

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-2026-64152?

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-2026-64152?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64152 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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