CVE-2026-43220 (GCVE-0-2026-43220)
Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-17 15:21
VLAI
EPSS
VEX
Title
iommu/amd: serialize sequence allocation under concurrent TLB invalidations
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.
Severity
5.5 (Medium)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
f2f65b28d802a667119147444ec2ae33eebf9a58 , < d51bf43193b1e95dc4e34e540dc76e19def2ae5a
(git)
Affected: 715c263119fd1b918a9fcbd8a36ea5b604a46324 , < fca7aa0264ae99e5ff287d0ced5af0b82b121c4f (git) Affected: e15768e68820142077bbca402d8e902f64ade1b0 , < 5000ce7fcb31067566a1a1a2e5b5bbff93625242 (git) Affected: 496269d12072ecb219826485bdbec70c92a8eef5 , < 48caa7542a795c9679ec1bd1bc2592e05a7369a4 (git) Affected: d2a0cac10597068567d336e85fa3cbdbe8ca62bf , < 9e249c48412828e807afddc21527eb734dc9bd3d (git) |
guessed | |
| Linux | Linux |
Affected:
6.6.128 , < 6.6.140
(semver)
Affected: 6.12.75 , < 6.12.88 (semver) |
guessed |
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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