HighFix available
uio: Fix stale info pointer in failed registration path
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: uio: Fix stale info pointer in failed registration path After device_add(), the UIO device is visible to userspace and /dev/uioX can be opened. If a later setup step fails, __uio_register_device() unwinds the device but leaves idev->info pointing at the caller-owned struct uio_info. That is unsafe when an opener races with the failed registration path. The open file keeps a reference to the uio_device, while the caller sees registration failure and may free its struct uio_info. Later file operations can then follow idev->info and dereference freed memory. Handle post-device_add() failures like unregister: remove UIO attributes while the info pointer is still valid, then clear idev->info under info_lock and wake existing waiters/async users before removing the device and minor. This makes already-open file descriptors observe the same "device gone" state as normal uio_unregister_device().
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.270, 5.15.221, 6.1.188, 6.12.110, 6.18.52, 6.6.157, 7.2.6
- CVEs
- CVE-2026-93054
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 6 Nov 2026, 02:40 UTC · Revision 1
Source evidence
uio: Fix stale info pointer in failed registration path
core-osv · Original sourcePublished 17 Sept 2026, 16:10 UTC
In the Linux kernel, the following vulnerability has been resolved: uio: Fix stale info pointer in failed registration path After device_add(), the UIO device is visible to userspace and /dev/uioX can be opened. If a later setup step fails, __uio_register_device() unwinds the device but leaves idev->info pointing at the caller-owned struct uio_info. That is unsafe when an opener races with the failed registration path. The open file keeps a reference to the uio_device, while the caller sees registration failure and may free its struct uio_info. Later file operations can then follow idev->info and dereference freed memory. Handle post-device_add() failures like unregister: remove UIO attributes while the info pointer is still valid, then clear idev->info under info_lock and wake existing waiters/async users before removing the device and minor. This makes already-open file descriptors observe the same "device gone" state as normal uio_unregister_device().
osv:CVE-2026-93054
Kernel
Fixed versions: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6
Complete source record
{
"id": "7c0e612c542b2d5106f945ea47f838fb86ea1ba1206c2534f3de41479f00a918",
"url": "https://osv.dev/vulnerability/CVE-2026-93054",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "uio: Fix stale info pointer in failed registration path",
"summary": "In the Linux kernel, the following vulnerability has been resolved: uio: Fix stale info pointer in failed registration path After device_add(), the UIO device is visible to userspace and /dev/uioX can be opened. If a later setup step fails, __uio_register_device() unwinds the device but leaves idev->info pointing at the caller-owned struct uio_info. That is unsafe when an opener races with the failed registration path. The open file keeps a reference to the uio_device, while the caller sees registration failure and may free its struct uio_info. Later file operations can then follow idev->info and dereference freed memory. Handle post-device_add() failures like unregister: remove UIO attributes while the info pointer is still valid, then clear idev->info under info_lock and wake existing waiters/async users before removing the device and minor. This makes already-open file descriptors observe the same \"device gone\" state as normal uio_unregister_device().",
"evidence": "osv:CVE-2026-93054",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.10.270",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.221",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.188",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.157",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.110",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.52",
"evidence": "/affected/1/ranges"
},
{
"value": "7.2.6",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "CVE-2026-93054",
"aliases": [
"CVE-2026-93054"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "a93e7b331568227500186a465fee3c2cb5dffd1f"
},
{
"fixed": "63eaa7663335d482a8825c231213e312cacea567"
},
{
"fixed": "df4faf65194ec6c315a59be4c6749eaeb3009243"
},
{
"fixed": "506b43dde5f9ac0068b1360e6b5dbee07fda59fb"
},
{
"fixed": "15340b00e665af805523b08515294a1aa1778151"
},
{
"fixed": "234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac"
},
{
"fixed": "16695e9059d80ea6661e8399064b0c01f641dd8c"
},
{
"fixed": "ec5bd6731183eb6f619140c9bef2ee11ed818c20"
},
{
"fixed": "67b6fc084b034a91c3ec7907a3fed89a2450f30b"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "4.14.100"
},
{
"fixed": "4.15"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "085d735c858934e5d5bfaedb1fc98bd9135e6ff1"
}
]
}
],
"versions": [
"v4.14.336",
"v4.14.335",
"v4.14.334",
"v4.14.333",
"v4.14.332",
"v4.14.331",
"v4.14.330",
"v4.14.329",
"v4.14.328",
"v4.14.327",
"v4.14.326",
"v4.14.325",
"v4.14.324",
"v4.14.323",
"v4.14.322",
"v4.14.321",
"v4.14.320",
"v4.14.319",
"v4.14.318",
"v4.14.317",
"v4.14.316",
"v4.14.315",
"v4.14.314",
"v4.14.313",
"v4.14.312",
"v4.14.311",
"v4.14.310",
"v4.14.309",
"v4.14.308",
"v4.14.307",
"v4.14.306",
"v4.14.305",
"v4.14.304",
"v4.14.303",
"v4.14.302",
"v4.14.301",
"v4.14.300",
"v4.14.299",
"v4.14.298",
"v4.14.297",
"v4.14.296",
"v4.14.295",
"v4.14.294",
"v4.14.293",
"v4.14.292",
"v4.14.291",
"v4.14.290",
"v4.14.289",
"v4.14.288",
"v4.14.287",
"v4.14.286",
"v4.14.285",
"v4.14.284",
"v4.14.283",
"v4.14.282",
"v4.14.281",
"v4.14.280",
"v4.14.279",
"v4.14.278",
"v4.14.277",
"v4.14.276",
"v4.14.275",
"v4.14.274",
"v4.14.273",
"v4.14.272",
"v4.14.271",
"v4.14.270",
"v4.14.269",
"v4.14.268",
"v4.14.267",
"v4.14.266",
"v4.14.265",
"v4.14.264",
"v4.14.263",
"v4.14.262",
"v4.14.261",
"v4.14.260",
"v4.14.259",
"v4.14.258",
"v4.14.257",
"v4.14.256",
"v4.14.255",
"v4.14.254",
"v4.14.253",
"v4.14.252",
"v4.14.251",
"v4.14.250",
"v4.14.249",
"v4.14.248",
"v4.14.247",
"v4.14.246",
"v4.14.245",
"v4.14.244",
"v4.14.243",
"v4.14.242",
"v4.14.241",
"v4.14.240",
"v4.14.239",
"v4.14.238",
"v4.14.237",
"v4.14.236",
"v4.14.235",
"v4.14.234",
"v4.14.233",
"v4.14.232",
"v4.14.231",
"v4.14.230",
"v4.14.229",
"v4.14.228",
"v4.14.227",
"v4.14.226",
"v4.14.225",
"v4.14.224",
"v4.14.223",
"v4.14.222",
"v4.14.221",
"v4.14.220",
"v4.14.219",
"v4.14.218",
"v4.14.217",
"v4.14.216",
"v4.14.215",
"v4.14.214",
"v4.14.213",
"v4.14.212",
"v4.14.211",
"v4.14.210",
"v4.14.209",
"v4.14.208",
"v4.14.207",
"v4.14.206",
"v4.14.205",
"v4.14.204",
"v4.14.203",
"v4.14.202",
"v4.14.201",
"v4.14.200",
"v4.14.199",
"v4.14.198",
"v4.14.197",
"v4.14.196",
"v4.14.195",
"v4.14.194",
"v4.14.193",
"v4.14.192",
"v4.14.191",
"v4.14.190",
"v4.14.189",
"v4.14.188",
"v4.14.187",
"v4.14.186",
"v4.14.185",
"v4.14.184",
"v4.14.183",
"v4.14.182",
"v4.14.181",
"v4.14.180",
"v4.14.179",
"v4.14.178",
"v4.14.177",
"v4.14.176",
"v4.14.175",
"v4.14.174",
"v4.14.173",
"v4.14.172",
"v4.14.171",
"v4.14.170",
"v4.14.169",
"v4.14.168",
"v4.14.167",
"v4.14.166",
"v4.14.165",
"v4.14.164",
"v4.14.163",
"v4.14.162",
"v4.14.161",
"v4.14.160",
"v4.14.159",
"v4.14.158",
"v4.14.157",
"v4.14.156",
"v4.14.155",
"v4.14.154",
"v4.14.153",
"v4.14.152",
"v4.14.151",
"v4.14.150",
"v4.14.149",
"v4.14.148",
"v4.14.147",
"v4.14.146",
"v4.14.145",
"v4.14.144",
"v4.14.143",
"v4.14.142",
"v4.14.141",
"v4.14.140",
"v4.14.139",
"v4.14.138",
"v4.14.137",
"v4.14.136",
"v4.14.135",
"v4.14.134",
"v4.14.133",
"v4.14.132",
"v4.14.131",
"v4.14.130",
"v4.14.129",
"v4.14.128",
"v4.14.127",
"v4.14.126",
"v4.14.125",
"v4.14.124",
"v4.14.123",
"v4.14.122",
"v4.14.121",
"v4.14.120",
"v4.14.119",
"v4.14.118",
"v4.14.117",
"v4.14.116",
"v4.14.115",
"v4.14.114",
"v4.14.113",
"v4.14.112",
"v4.14.111",
"v4.14.110",
"v4.14.109",
"v4.14.108",
"v4.14.107",
"v4.14.106",
"v4.14.105",
"v4.14.104",
"v4.14.103",
"v4.14.102",
"v4.14.101",
"v4.14.100"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93054.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.18.0"
},
{
"fixed": "5.10.270"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.11.0"
},
{
"fixed": "5.15.221"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.16.0"
},
{
"fixed": "6.1.188"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
},
{
"fixed": "6.6.157"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
},
{
"fixed": "6.12.110"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
},
{
"fixed": "6.18.52"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.2.6"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93054.json"
}
}
],
"modified": "2026-10-28T02:30:46.181660169Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151",
"https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c",
"https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac",
"https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb",
"https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567",
"https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b",
"https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243",
"https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93054.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-93054",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93054.json"
}
},
"related_cves": [
{
"value": "CVE-2026-93054",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 514361,
"published_at": "2026-09-17T16:10:43.104+00:00"
}