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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-43220

iommu/amd: serialize sequence allocation under concurrent TLB invalidations

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/amd: serialize sequence allocation under concurrent TLB invalidations With concurrent TLB invalidations, completion wait randomly gets timed out because cmd_sem_val was incremented outside the IOMMU spinlock, allowing CMD_COMPL_WAIT commands to be queued out of sequence and breaking the ordering assumption in wait_on_sem(). Move the cmd_sem_val increment under iommu->lock so completion sequence allocation is serialized with command queuing. And remove the unnecessary return.

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

  • f2f65b28d802a667119147444ec2ae33eebf9a58 to < d51bf43193b1e95dc4e34e540dc76e19def2ae5aaffected
  • 715c263119fd1b918a9fcbd8a36ea5b604a46324 to < fca7aa0264ae99e5ff287d0ced5af0b82b121c4faffected
  • e15768e68820142077bbca402d8e902f64ade1b0 to < 5000ce7fcb31067566a1a1a2e5b5bbff93625242affected
  • 496269d12072ecb219826485bdbec70c92a8eef5 to < 48caa7542a795c9679ec1bd1bc2592e05a7369a4affected
  • d2a0cac10597068567d336e85fa3cbdbe8ca62bf to < 9e249c48412828e807afddc21527eb734dc9bd3daffected
  • 69d9339c02eddfc2a345be7220651068a3684383affected
  • 6.1.191 to < 6.2affected

Linux Linux

Default version status: unaffected

  • 6.6.128 to < 6.6.140affected
  • 6.12.75 to < 6.12.88affected

References