CVE-2026-80894
- Source
- https://cve.org/CVERecord?id=CVE-2026-80894
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80894.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-80894
- Downstream
- Published
- 2026-09-04T17:11:10Z
- Modified
- 2026-10-08T02:52:03Z
- Summary
- iommufd: Fix wrong hwpt passed to iommufd_auto_response_faults on replace
- 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.
-
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80894.json" }- References
-
- https://git.kernel.org/stable/c/564ac339c0f8bada4e77a57a92bab9d3df635e07
- https://git.kernel.org/stable/c/8eb077025279304268bd58657f0af3d388822b21
- https://git.kernel.org/stable/c/adb87155b67f9759ff010c0a99559f5bffa45dcf
- https://git.kernel.org/stable/c/ba5c0f28a26e7d9be1e0997f8920dd638e2782fd
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80894.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-80894
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6d11543bf37abdf60b8e6022a62fccfb82a5fe2eFixedadb87155b67f9759ff010c0a99559f5bffa45dcf
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfb21b1568adaa76af7a8c853f37c60fba8b28661Fixed564ac339c0f8bada4e77a57a92bab9d3df635e07Fixed8eb077025279304268bd58657f0af3d388822b21Fixedba5c0f28a26e7d9be1e0997f8920dd638e2782fd
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.24Fixed6.12.105
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.13.12Fixed6.14
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.14.3Fixed6.15
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1e0216b6a58c79b5ee91c78706d5f560e4d1f56f
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4b23c4b991eb90cc7bca42e9f81142feedd4bb56