UnratedFix available
usb: gadget: fix null pointer dereference in usb_put_function_instance()
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: fix null pointer dereference in usb_put_function_instance() usb_put_function_instance() attempts to dereference fd inside fi struct to get mod in uvc_alloc_inst() error path. However, fd is not allocated until later in try_get_usb_function_instance() after allocating fi in uvc_alloc_inst() and thus guranteed to be null in error path. Fix this by adding a null check for fi->fd that returns if fd is null.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.270, 5.15.221, 6.1.188, 6.12.110, 6.18.51, 6.6.157, 7.2.5
- CVEs
- CVE-2026-90019
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 19:25 UTC · Revision 1
Source evidence
usb: gadget: fix null pointer dereference in usb_put_function_instance()
core-osv · Original sourcePublished 16 Sept 2026, 10:33 UTC
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: fix null pointer dereference in usb_put_function_instance() usb_put_function_instance() attempts to dereference fd inside fi struct to get mod in uvc_alloc_inst() error path. However, fd is not allocated until later in try_get_usb_function_instance() after allocating fi in uvc_alloc_inst() and thus guranteed to be null in error path. Fix this by adding a null check for fi->fd that returns if fd is null.
osv:CVE-2026-90019
Kernel
Fixed versions: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5
Complete source record
{
"id": "e1185c80245f343c03cab190c54dbbfc84655eaab9df47f3f419043206289e0c",
"url": "https://osv.dev/vulnerability/CVE-2026-90019",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "usb: gadget: fix null pointer dereference in usb_put_function_instance()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: usb: gadget: fix null pointer dereference in usb_put_function_instance() usb_put_function_instance() attempts to dereference fd inside fi struct to get mod in uvc_alloc_inst() error path. However, fd is not allocated until later in try_get_usb_function_instance() after allocating fi in uvc_alloc_inst() and thus guranteed to be null in error path. Fix this by adding a null check for fi->fd that returns if fd is null.",
"evidence": "osv:CVE-2026-90019",
"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": "6.18.51",
"evidence": "/affected/1/ranges"
},
{
"value": "7.2.5",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CVE-2026-90019",
"aliases": [
"CVE-2026-90019"
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2"
},
{
"fixed": "0fc54a00954f9f4c3e3d4ffa64a530685d99a39b"
},
{
"fixed": "6e6736c049683380f5e20becde498986e9293ca4"
},
{
"fixed": "3a9691fff79bcce95338435599df6d3ae433cfdc"
},
{
"fixed": "7a4f4ca7ff32ae24807c83e2a06d62b13378d53c"
},
{
"fixed": "6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0"
},
{
"fixed": "d3a7fa61997db3bf6dadef4c1bd87a4fa782a817"
},
{
"fixed": "5117f236e9e30744338b425395d55913c4500897"
},
{
"fixed": "6e74ac5c596fd246e37eadfc354567179ccbe9aa"
}
]
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90019.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.9.0"
},
{
"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": "6.18.51"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.2.5"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90019.json"
}
}
],
"modified": "2026-10-28T02:30:31.527371007Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/0fc54a00954f9f4c3e3d4ffa64a530685d99a39b",
"https://git.kernel.org/stable/c/3a9691fff79bcce95338435599df6d3ae433cfdc",
"https://git.kernel.org/stable/c/5117f236e9e30744338b425395d55913c4500897",
"https://git.kernel.org/stable/c/6e6736c049683380f5e20becde498986e9293ca4",
"https://git.kernel.org/stable/c/6e74ac5c596fd246e37eadfc354567179ccbe9aa",
"https://git.kernel.org/stable/c/6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0",
"https://git.kernel.org/stable/c/7a4f4ca7ff32ae24807c83e2a06d62b13378d53c",
"https://git.kernel.org/stable/c/d3a7fa61997db3bf6dadef4c1bd87a4fa782a817",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90019.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-90019",
"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/2026/90xxx/CVE-2026-90019.json"
}
},
"related_cves": [
{
"value": "CVE-2026-90019",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 498696,
"published_at": "2026-09-16T10:33:24.173+00:00"
}