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CVE PROGRAM SOURCE RECORDUnscored

CVE-2022-48894

iommu/arm-smmu-v3: Don't unregister on shutdown

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Don't unregister on shutdown Similar to SMMUv2, this driver calls iommu_device_unregister() from the shutdown path, which removes the IOMMU groups with no coordination whatsoever with their users - shutdown methods are optional in device drivers. This can lead to NULL pointer dereferences in those drivers' DMA API calls, or worse. Instead of calling the full arm_smmu_device_remove() from arm_smmu_device_shutdown(), let's pick only the relevant function call - arm_smmu_device_disable() - more or less the reverse of arm_smmu_device_reset() - and call just that from the shutdown path.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 57365a04c92126525a58bf7a1599ddfa832415e9 to < ead3e6c79479890444c777fd329afc125fecde48affected
  • 57365a04c92126525a58bf7a1599ddfa832415e9 to < 32ea2c57dc216b6ad8125fa680d31daa5d421c95affected

Linux Linux

Default version status: affected

  • 6.1affected
  • 0 to < 6.1unaffected
  • 6.1.7 to ≤ 6.1.*unaffected
  • 6.2 to ≤ *unaffected

References