libusb-1.0 — security advisory
libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but is followed by a class-specific descriptor whose bLength exceeds the remaining buffer size, causing parse_interface() to return early without allocating the endpoint array. Attackers can exploit this flaw through libusb_get_active_config_descriptor or libusb_get_config_descriptor by providing crafted descriptors via virtualized USB passthrough, file-based descriptor parsing, or network sources, causing any application iterating over endpoints to dereference a NULL endpoint pointer and crash.
- Products
- libusb-1.0
- Affected versions
- 2:1.0.26-1, 2:1.0.27-1, 2:1.0.27-2, 2:1.0.27~rc1-1, 2:1.0.27~rc1-2, 2:1.0.27~rc1-3, 2:1.0.27~rc1-4, 2:1.0.27~rc1-5, 2:1.0.27~rc2-1, 2:1.0.28-1, 2:1.0.28~rc1-1, 2:1.0.29-1, 2:1.0.29-2, 2:1.0.30-1, 2:1.0.30~rc1-1, 2:1.0.30~rc2-1
- Fixed versions
- 2:1.0.30-1
- CVEs
- CVE-2026-23679
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 16:18 UTC · Revision 1
Source evidence
libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but is followed by a class-specific descriptor whose bLength exceeds the remaining buffer size, causing parse_interface() to return early without allocating the endpoint array. Attackers can exploit this flaw through libusb_get_active_config_descriptor or libusb_get_config_descriptor by providing crafted descriptors via virtualized USB passthrough, file-based descriptor parsing, or network sources, causing any application iterating over endpoints to dereference a NULL endpoint pointer and crash.
osv:DEBIAN-CVE-2026-23679
libusb-1.0
Fixed versions: Not specified
libusb-1.0
Fixed versions: Not specified
libusb-1.0
Fixed versions: 2:1.0.30-1
Complete source record
{
"id": "be2b089920d73a26b6d6b3221dcef4df079144d605a1b771e0554452a8a610f6",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-23679",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-23679",
"summary": "libusb before version 1.0.30 contains a NULL pointer dereference vulnerability that allows attackers to crash applications by supplying a malformed USB configuration descriptor where an interface claims bNumEndpoints greater than zero but is followed by a class-specific descriptor whose bLength exceeds the remaining buffer size, causing parse_interface() to return early without allocating the endpoint array. Attackers can exploit this flaw through libusb_get_active_config_descriptor or libusb_get_config_descriptor by providing crafted descriptors via virtualized USB passthrough, file-based descriptor parsing, or network sources, causing any application iterating over endpoints to dereference a NULL endpoint pointer and crash.",
"evidence": "osv:DEBIAN-CVE-2026-23679",
"products": [
{
"name": {
"value": "libusb-1.0",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2:1.0.26-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.27-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.27-2",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.27~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.27~rc1-2",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.27~rc1-3",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.27~rc1-4",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.27~rc1-5",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.27~rc2-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.28-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.28~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.29-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.29-2",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.30-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.30~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2:1.0.30~rc2-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libusb-1.0",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2:1.0.28-1",
"evidence": "/affected/1/versions"
},
{
"value": "2:1.0.29-1",
"evidence": "/affected/1/versions"
},
{
"value": "2:1.0.29-2",
"evidence": "/affected/1/versions"
},
{
"value": "2:1.0.30-1",
"evidence": "/affected/1/versions"
},
{
"value": "2:1.0.30~rc1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2:1.0.30~rc2-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libusb-1.0",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:1.0.30-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "2:1.0.28-1",
"evidence": "/affected/2/versions"
},
{
"value": "2:1.0.29-1",
"evidence": "/affected/2/versions"
},
{
"value": "2:1.0.29-2",
"evidence": "/affected/2/versions"
},
{
"value": "2:1.0.30~rc1-1",
"evidence": "/affected/2/versions"
},
{
"value": "2:1.0.30~rc2-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-23679",
"aliases": [
"DEBIAN-CVE-2026-23679"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libusb-1.0",
"purl": "pkg:deb/debian/libusb-1.0?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2:1.0.26-1",
"2:1.0.27-1",
"2:1.0.27-2",
"2:1.0.27~rc1-1",
"2:1.0.27~rc1-2",
"2:1.0.27~rc1-3",
"2:1.0.27~rc1-4",
"2:1.0.27~rc1-5",
"2:1.0.27~rc2-1",
"2:1.0.28-1",
"2:1.0.28~rc1-1",
"2:1.0.29-1",
"2:1.0.29-2",
"2:1.0.30-1",
"2:1.0.30~rc1-1",
"2:1.0.30~rc2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23679.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libusb-1.0",
"purl": "pkg:deb/debian/libusb-1.0?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2:1.0.28-1",
"2:1.0.29-1",
"2:1.0.29-2",
"2:1.0.30-1",
"2:1.0.30~rc1-1",
"2:1.0.30~rc2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23679.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:1.0.30-1"
}
]
}
],
"package": {
"name": "libusb-1.0",
"purl": "pkg:deb/debian/libusb-1.0?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2:1.0.28-1",
"2:1.0.29-1",
"2:1.0.29-2",
"2:1.0.30~rc1-1",
"2:1.0.30~rc2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23679.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T09:47:28.650846313Z",
"provider": "osv",
"upstream": [
"CVE-2026-23679"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-23679"
]
},
"related_cves": [
{
"value": "CVE-2026-23679",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 327427,
"published_at": "2026-05-27T14:16:44.17+00:00"
}