Riskcovery

CVE-2026-45931

accel/amdxdna: Hold mm structure across iommu_sva_unbind_device()

State
Published
Severity
7.8 High
Published
May 27, 2026
Updated
Aug 5, 2026
Reserved
May 13, 2026

Read the record on cve.org

Description

In 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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • be462c97b7dfd24999babe39cce3de224ebe1f80 to before f6b4c1d98a7b8040d4d02e89425b3942016a2c2cAffected
  • be462c97b7dfd24999babe39cce3de224ebe1f80 to before f31ccf6278132a35a652fe5eeac3941e1e912398Affected
  • be462c97b7dfd24999babe39cce3de224ebe1f80 to before a9162439ad792afcddc04718408ec1380b7a5f63Affected
LinuxLinux
  • 6.14Affected
  • before 6.14Not affected
  • 6.18.14 through 6.18.*Not affected
  • 6.19.4 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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