CVE-2026-43220
N/A
N/A
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f2f65b28d802a667119147444ec2ae33eebf9a58 < d51bf43193b1e95dc4e34e540dc76e19def2ae5a | affected |
| Linux | Linux | 715c263119fd1b918a9fcbd8a36ea5b604a46324 < fca7aa0264ae99e5ff287d0ced5af0b82b121c4f | affected |
| Linux | Linux | e15768e68820142077bbca402d8e902f64ade1b0 < 5000ce7fcb31067566a1a1a2e5b5bbff93625242 | affected |
| Linux | Linux | 496269d12072ecb219826485bdbec70c92a8eef5 < 48caa7542a795c9679ec1bd1bc2592e05a7369a4 | affected |
| Linux | Linux | d2a0cac10597068567d336e85fa3cbdbe8ca62bf < 9e249c48412828e807afddc21527eb734dc9bd3d | affected |
| Linux | Linux | 6.6.128 < 6.6.140 | affected |
| Linux | Linux | 6.12.75 < 6.12.88 | affected |
Weaknesses
References
- https://git.kernel.org/stable/c/d51bf43193b1e95dc4e34e540dc76e19def2ae5a
- https://git.kernel.org/stable/c/fca7aa0264ae99e5ff287d0ced5af0b82b121c4f
- https://git.kernel.org/stable/c/5000ce7fcb31067566a1a1a2e5b5bbff93625242
- https://git.kernel.org/stable/c/48caa7542a795c9679ec1bd1bc2592e05a7369a4
- https://git.kernel.org/stable/c/9e249c48412828e807afddc21527eb734dc9bd3d
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.