CVE-2026-23429 PUBLISHED

iommu/sva: Fix crash in iommu_sva_unbind_device()

Assigner: Linux
Reserved: 13.01.2026 Published: 03.04.2026 Updated: 03.04.2026

In the Linux kernel, the following vulnerability has been resolved:

iommu/sva: Fix crash in iommu_sva_unbind_device()

domain->mm->iommu_mm can be freed by iommu_domain_free(): iommu_domain_free() mmdrop() __mmdrop() mm_pasid_drop() After iommu_domain_free() returns, accessing domain->mm->iommu_mm may dereference a freed mm structure, leading to a crash.

Fix this by moving the code that accesses domain->mm->iommu_mm to before the call to iommu_domain_free().

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 9f0a7ab700f8620e433b05c57fbd26c92ea186d9 to 58abeb7b9562f25bdfa2f5ae5ce803eb02e74433 (excl.)
  • affected from e37d5a2d60a338c5917c45296bac65da1382eda5 to f5daaa2c959d9f894fb5b1ab76da8612dd220a0d (excl.)
  • affected from e37d5a2d60a338c5917c45296bac65da1382eda5 to 06e14c36e20b48171df13d51b89fe67c594ed07a (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.19 is affected
  • unaffected from 0 to 6.19 (excl.)
  • unaffected from 6.18.20 to 6.18.* (incl.)
  • unaffected from 6.19.10 to 6.19.* (incl.)
  • unaffected from 7.0-rc5 to * (incl.)

References