CVE-2026-23429: iommu/sva: Fix crash in iommu_sva_unbind_device()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-03 · updated 2026-07-24

Description

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().

Affected products

Linux kernel: from 6.18.7 before 6.18.20; from 6.19.1 before 6.19.10; 6.19, 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5 (+2) — fixed in 6.18.20, 6.19.10

How to fix

Upgrade to a fixed version: Linux kernel 6.18.20, 6.19.10. Check the vendor advisory for mitigations.

References

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