CVE-2026-64152iommu: Handle unmap error when iommu_debug is enabled
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ccc21213f013834b484cdcc738e282f963fcfc97 before 0cd028806efc148a75d4acf711d21db335a89661; from ccc21213f013834b484cdcc738e282f963fcfc97 before 0735c54804c709d1b292f3b6947cfb560b2ce552 | CNA record |
linux linux_kernel linux:linux_kernel | from 7.0 before 7.0.11; 7.1; 7.1; 7.1 | NVD |
References
- https://git.kernel.org/stable/c/0cd028806efc148a75d4acf711d21db335a89661patch
- https://git.kernel.org/stable/c/0735c54804c709d1b292f3b6947cfb560b2ce552patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.