CVE-2026-80894 (GCVE-0-2026-80894)
Vulnerability from cvelistv5 – Published: 2026-09-04 17:11 – Updated: 2026-09-04 17:11
VLAI
EPSS
VEX
Title
iommufd: Fix wrong hwpt passed to iommufd_auto_response_faults on replace
Summary
In the Linux kernel, the following vulnerability has been resolved:
iommufd: Fix wrong hwpt passed to iommufd_auto_response_faults on replace
iommufd_hwpt_replace_device() calls:
iommufd_auto_response_faults(hwpt, old_handle);
passing the *new* hwpt together with the handle of
the device's *old* domain. This should be a parameter mismatch:
1. Semantically, iommufd_auto_response_faults(x, handle) scans
x->fault's deliver list and response xarray for groups matching
"handle". A group is queued under the hwpt that was attached at
fault-delivery time. old_handle is fetched *before* the domain switch,
so its group lives on old->fault, not on the new hwpt->fault.
2. Historically, the first argument was "old". The routine was
introduced by commit b7d8833677ba ("iommufd: Fault-capable hwpt
attach/detach/replace") as __fault_domain_replace_dev() in
fault.c, correctly calling iommufd_auto_response_faults(old, curr).
Commit fb21b1568ada ("iommufd: Make attach_handle generic than
fault specific") moved this into iommufd_hwpt_replace_device() in
device.c and swapped it to "hwpt". This should be a refactor regression,
not an intentional change.
Fix this by passing "old" instead.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
6d11543bf37abdf60b8e6022a62fccfb82a5fe2e , < adb87155b67f9759ff010c0a99559f5bffa45dcf
(git)
Affected: fb21b1568adaa76af7a8c853f37c60fba8b28661 , < 564ac339c0f8bada4e77a57a92bab9d3df635e07 (git) Affected: fb21b1568adaa76af7a8c853f37c60fba8b28661 , < 8eb077025279304268bd58657f0af3d388822b21 (git) Affected: fb21b1568adaa76af7a8c853f37c60fba8b28661 , < ba5c0f28a26e7d9be1e0997f8920dd638e2782fd (git) Affected: 1e0216b6a58c79b5ee91c78706d5f560e4d1f56f (git) Affected: 4b23c4b991eb90cc7bca42e9f81142feedd4bb56 (git) Affected: 6.12.24 , < 6.12.105 (semver) Affected: 6.13.12 , < 6.14 (semver) Affected: 6.14.3 , < 6.15 (semver) |
guessed | |
| Linux | Linux |
Affected:
6.15
Unaffected: 0 , < 6.15 (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
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},
{
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],
"cpeApplicability": [
{
"nodes": [
{
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Fix wrong hwpt passed to iommufd_auto_response_faults on replace\n\niommufd_hwpt_replace_device() calls:\n\n\tiommufd_auto_response_faults(hwpt, old_handle);\n\npassing the *new* hwpt together with the handle of\nthe device\u0027s *old* domain. This should be a parameter mismatch:\n\n1. Semantically, iommufd_auto_response_faults(x, handle) scans\n x-\u003efault\u0027s deliver list and response xarray for groups matching\n \"handle\". A group is queued under the hwpt that was attached at\n fault-delivery time. old_handle is fetched *before* the domain switch,\n so its group lives on old-\u003efault, not on the new hwpt-\u003efault.\n\n2. Historically, the first argument was \"old\". The routine was\n introduced by commit b7d8833677ba (\"iommufd: Fault-capable hwpt\n attach/detach/replace\") as __fault_domain_replace_dev() in\n fault.c, correctly calling iommufd_auto_response_faults(old, curr).\n Commit fb21b1568ada (\"iommufd: Make attach_handle generic than\n fault specific\") moved this into iommufd_hwpt_replace_device() in\n device.c and swapped it to \"hwpt\". This should be a refactor regression,\n not an intentional change.\n\nFix this by passing \"old\" instead."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-04T17:11:10.093Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/adb87155b67f9759ff010c0a99559f5bffa45dcf"
},
{
"url": "https://git.kernel.org/stable/c/564ac339c0f8bada4e77a57a92bab9d3df635e07"
},
{
"url": "https://git.kernel.org/stable/c/8eb077025279304268bd58657f0af3d388822b21"
},
{
"url": "https://git.kernel.org/stable/c/ba5c0f28a26e7d9be1e0997f8920dd638e2782fd"
}
],
"title": "iommufd: Fix wrong hwpt passed to iommufd_auto_response_faults on replace",
"x_generator": {
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}
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"cveMetadata": {
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"cveId": "CVE-2026-80894",
"datePublished": "2026-09-04T17:11:10.093Z",
"dateReserved": "2026-08-26T14:34:25.800Z",
"dateUpdated": "2026-09-04T17:11:10.093Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-09-05T00:25:05Z",
"cve": "CVE-2026-80894",
"id": "CVE-2026-80894",
"initial_release_date": "2026-09-05T00:25:05Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-80894",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80894.json",
"version": "2"
}
}
}
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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.
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.
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