CVE-2026-80894 (GCVE-0-2026-80894)
Vulnerability from cvelistv5
Published
2026-09-04 17:11
Modified
2026-09-04 17:11
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 6d11543bf37abdf60b8e6022a62fccfb82a5fe2e Version: fb21b1568adaa76af7a8c853f37c60fba8b28661 Version: fb21b1568adaa76af7a8c853f37c60fba8b28661 Version: fb21b1568adaa76af7a8c853f37c60fba8b28661 Version: 1e0216b6a58c79b5ee91c78706d5f560e4d1f56f Version: 4b23c4b991eb90cc7bca42e9f81142feedd4bb56 Version: 6.12.24 ≤ Version: 6.13.12 ≤ Version: 6.14.3 ≤ |
||
{
"containers": {
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"programFiles": [
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{
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"programFiles": [
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],
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{
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"status": "unaffected",
"version": "6.18.44",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"versionStartIncluding": "6.12.24",
"vulnerable": true
},
{
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{
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"negate": false,
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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": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"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"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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