accel/amdxdna: Hold mm structure across iommu_sva_unbind_device()

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Summary

CVECVE-2026-45931
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:09 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Hold mm structure across iommu_sva_unbind_device() Some tests trigger a crash in iommu_sva_unbind_device() due to accessing iommu_mm after the associated mm structure has been freed. Fix this by taking an explicit reference to the mm structure after successfully binding the device, and releasing it only after the device is unbound. This ensures the mm remains valid for the entire SVA bind/unbind lifetime.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected be462c97b7dfd24999babe39cce3de224ebe1f80 f6b4c1d98a7b8040d4d02e89425b3942016a2c2c git Not specified
CNA Linux Linux affected be462c97b7dfd24999babe39cce3de224ebe1f80 f31ccf6278132a35a652fe5eeac3941e1e912398 git Not specified
CNA Linux Linux affected be462c97b7dfd24999babe39cce3de224ebe1f80 a9162439ad792afcddc04718408ec1380b7a5f63 git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.14 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.4 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f31ccf6278132a35a652fe5eeac3941e1e912398 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f6b4c1d98a7b8040d4d02e89425b3942016a2c2c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a9162439ad792afcddc04718408ec1380b7a5f63 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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