CVE-2026-64152 Details
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.
A vulnerability in the Linux kernel's IOMMU (Input-Output Memory Management Unit) handling has been addressed. When 'iommu_debug' is enabled, an error in the mapping process could lead to improper unmapping, causing a mismatch in the tracking of memory operations. This issue has been resolved by adjusting the error handling to ensure that any partial mappings are correctly recorded and then unmade, preventing inconsistencies in the debugging trace.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for downloading the updated kernel can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0735c54804c709d1b292f3b6947cfb560b2ce552 | kernel.org | Patch |
| https://git.kernel.org/stable/c/0cd028806efc148a75d4acf711d21db335a89661 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 7.0, < 7.0.11 7.1 rc1 7.1 rc2 7.1 rc3 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 17, 2026 | Initial Analysis | [email protected] |
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 19, 2026 | New CVE Received | kernel.org |