CVE-2026-43220
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-05-06
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
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 Software (10)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | f2f65b28d802a667119147444ec2ae33eebf9a58 < d51bf43193b1e95dc4e34e540dc76e19def2ae5a |
| Linux | Linux | 715c263119fd1b918a9fcbd8a36ea5b604a46324 < fca7aa0264ae99e5ff287d0ced5af0b82b121c4f |
| Linux | Linux | e15768e68820142077bbca402d8e902f64ade1b0 < 5000ce7fcb31067566a1a1a2e5b5bbff93625242 |
| Linux | Linux | 496269d12072ecb219826485bdbec70c92a8eef5 < 48caa7542a795c9679ec1bd1bc2592e05a7369a4 |
| Linux | Linux | d2a0cac10597068567d336e85fa3cbdbe8ca62bf < 9e249c48412828e807afddc21527eb734dc9bd3d |
| Linux | Linux | 69d9339c02eddfc2a345be7220651068a3684383 |
| Linux | Linux | 6.1.191 < 6.2 |
| Linux | Linux | 6.6.128 < 6.6.140 |
| Linux | Linux | 6.12.75 < 6.12.88 |
| linux | linux_kernel | 6.6.128 – 6.7 |