Vulnerability Details CVE-2026-64152
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 1.4%
CVSS Severity
CVSS v3 Score 7.8
References
Products affected by CVE-2026-64152
-
cpe:2.3:o:linux:linux_kernel:7.0
-
cpe:2.3:o:linux:linux_kernel:7.0.1
-
cpe:2.3:o:linux:linux_kernel:7.0.10
-
cpe:2.3:o:linux:linux_kernel:7.0.2
-
cpe:2.3:o:linux:linux_kernel:7.0.3
-
cpe:2.3:o:linux:linux_kernel:7.0.4
-
cpe:2.3:o:linux:linux_kernel:7.0.5
-
cpe:2.3:o:linux:linux_kernel:7.0.6
-
cpe:2.3:o:linux:linux_kernel:7.0.7
-
cpe:2.3:o:linux:linux_kernel:7.0.8
-
cpe:2.3:o:linux:linux_kernel:7.0.9
-
cpe:2.3:o:linux:linux_kernel:7.1