{"id":"DEBIAN-CVE-2026-23679","details":"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.","modified":"2026-09-14T17:02:58.016796985Z","published":"2026-05-27T14:16:44.170Z","upstream":["CVE-2026-23679"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-23679"}],"affected":[{"package":{"name":"libusb-1.0","ecosystem":"Debian:12","purl":"pkg:deb/debian/libusb-1.0?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23679.json"}},{"package":{"name":"libusb-1.0","ecosystem":"Debian:13","purl":"pkg:deb/debian/libusb-1.0?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23679.json"}},{"package":{"name":"libusb-1.0","ecosystem":"Debian:14","purl":"pkg:deb/debian/libusb-1.0?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.0.30-1"}]}],"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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23679.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}