CVE-2026-43220None▾ SunlitIn 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_…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= f2f65b28d802a667119147444ec2ae33eebf9a58 < d51bf43193b1e95dc4e34e540dc76e19def2ae5aLinux >= 715c263119fd1b918a9fcbd8a36ea5b604a46324 < fca7aa0264ae99e5ff287d0ced5af0b82b121c4fLinux >= e15768e68820142077bbca402d8e902f64ade1b0 < 5000ce7fcb31067566a1a1a2e5b5bbff93625242Linux >= 496269d12072ecb219826485bdbec70c92a8eef5 < 48caa7542a795c9679ec1bd1bc2592e05a7369a4Linux >= d2a0cac10597068567d336e85fa3cbdbe8ca62bf < 9e249c48412828e807afddc21527eb734dc9bd3dLinux 69d9339c02eddfc2a345be7220651068a3684383Linux >= 6.1.191 < 6.2Linux >= 6.6.128 < 6.6.140Linux >= 6.12.75 < 6.12.88Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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