{"id":"CVE-2026-80894","summary":"iommufd: Fix wrong hwpt passed to iommufd_auto_response_faults on replace","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's *old* domain. This should be a parameter mismatch:\n\n1. Semantically, iommufd_auto_response_faults(x, handle) scans\n   x-\u003efault's 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.","modified":"2026-10-08T02:52:03.107886279Z","published":"2026-09-04T17:11:10.093Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80894.json"},"references":[{"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"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80894.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80894"},{"type":"PACKAGE","url":"https://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":[{"introduced":"6d11543bf37abdf60b8e6022a62fccfb82a5fe2e"},{"fixed":"adb87155b67f9759ff010c0a99559f5bffa45dcf"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"fb21b1568adaa76af7a8c853f37c60fba8b28661"},{"fixed":"564ac339c0f8bada4e77a57a92bab9d3df635e07"},{"fixed":"8eb077025279304268bd58657f0af3d388822b21"},{"fixed":"ba5c0f28a26e7d9be1e0997f8920dd638e2782fd"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.24"},{"fixed":"6.12.105"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.13.12"},{"fixed":"6.14"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.14.3"},{"fixed":"6.15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1e0216b6a58c79b5ee91c78706d5f560e4d1f56f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4b23c4b991eb90cc7bca42e9f81142feedd4bb56"}]}],"versions":["v6.12.104","v6.12.103","v6.12.102","v6.12.101","v6.12.100","v6.12.99","v6.12.98","v6.12.97","v6.12.96","v6.12.95","v6.12.94","v6.12.93","v6.12.92","v6.12.91","v6.12.90","v6.12.89","v6.12.88","v6.12.87","v6.12.86","v6.12.85","v6.12.84","v6.12.83","v6.12.82","v6.12.81","v6.12.80","v6.12.79","v6.12.78","v6.12.77","v6.12.76","v6.12.75","v6.12.74","v6.12.73","v6.12.72","v6.12.71","v6.12.70","v6.12.69","v6.12.68","v6.12.67","v6.12.66","v6.12.65","v6.12.64","v6.12.63","v6.12.62","v6.12.61","v6.12.60","v6.12.59","v6.12.58","v6.12.57","v6.12.56","v6.12.55","v6.12.54","v6.12.53","v6.12.52","v6.12.51","v6.12.50","v6.12.49","v6.12.48","v6.12.47","v6.12.46","v6.12.45","v6.12.44","v6.12.43","v6.12.42","v6.12.41","v6.12.40","v6.12.39","v6.12.38","v6.12.37","v6.12.36","v6.12.35","v6.12.34","v6.12.33","v6.12.32","v6.12.31","v6.12.30","v6.12.29","v6.12.28","v6.12.27","v6.12.26","v6.12.25","v6.12.24","v6.13.12","v6.14.11","v6.14.10","v6.14.9","v6.14.8","v6.14.7","v6.14.6","v6.14.5","v6.14.4","v6.14.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80894.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.105"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.15.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80894.json"}}],"schema_version":"1.9.0"}