Vulnerability-Lookup

GHSA-JG86-GJJJ-22QV

Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31

Details

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:

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.
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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80894"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-04T18:17:57Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-jg86-gjjj-22qv",
  "modified": "2026-09-04T18:31:33Z",
  "published": "2026-09-04T18:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80894"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/564ac339c0f8bada4e77a57a92bab9d3df635e07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8eb077025279304268bd58657f0af3d388822b21"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/adb87155b67f9759ff010c0a99559f5bffa45dcf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba5c0f28a26e7d9be1e0997f8920dd638e2782fd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-80894 (GCVE-0-2026-80894)

Vulnerability from cvelistv5 – Published: 2026-09-04 17:11 – Updated: 2026-09-04 17:11

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

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/adb87155b67f9759f…
https://git.kernel.org/stable/c/564ac339c0f8bada4…
https://git.kernel.org/stable/c/8eb07702527930426…
https://git.kernel.org/stable/c/ba5c0f28a26e7d9be…

Impacted products

2 products

Vendor	Product	Version
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)
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)

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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.

Detection rules are retrieved from Rulezet.

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.

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GHSA-JG86-GJJJ-22QV

CVE-2026-80894 (GCVE-0-2026-80894)

Tags

Sightings

Nomenclature