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Description

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.

PUBLISHED Reserved 2026-01-14 | Published 2026-05-27 | Updated 2026-05-28 | Assigner VulnCheck




MEDIUM: 6.9CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

MEDIUM: 6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Out-of-bounds Read

Product status

Default status
affected

Any version before 1.0.30
affected

Credits

djnn finder

References

github.com/libusb/libusb/issues/1813 exploit

github.com/libusb/libusb/releases/tag/v1.0.30 release-notes

github.com/libusb/libusb/issues/1813 technical-description

github.com/libusb/libusb/pull/1814 issue-tracking

github.com/...ommit/578ab76b4c434f8b204137ab6d7310689c7a9704 patch

www.vulncheck.com/...-pointer-dereference-in-parse-interface third-party-advisory

cve.org (CVE-2026-23679)

nvd.nist.gov (CVE-2026-23679)

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