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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-80687

iommufd/viommu: Release the igroup lock on the vdevice_size error path

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: iommufd/viommu: Release the igroup lock on the vdevice_size error path iommufd_vdevice_alloc_ioctl() takes idev->igroup->lock, then validates the driver's vdevice_size against the core structure size with a WARN_ON_ONCE. On failure that guard jumps to out_put_idev, below out_unlock_igroup, so it skips the mutex_unlock(), leaving the igroup lock held and deadlocking the next vDEVICE operation on that group. Jump to out_unlock_igroup instead.

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

  • ed42eee797ff3dc889ade63c1dd7c4f430699e23 to < 294b464b2be7e57872864cb6936e1d9c7294f89daffected
  • ed42eee797ff3dc889ade63c1dd7c4f430699e23 to < ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86affected
  • ed42eee797ff3dc889ade63c1dd7c4f430699e23 to < 339bd11591593ab7ce88136ab7fd01ef3813b724affected

Linux Linux

Default version status: affected

  • 6.17affected
  • 0 to < 6.17unaffected
  • 6.18.44 to ≤ 6.18.*unaffected
  • 7.1.8 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References