CVE-2026-23679

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.

CVSS v3 6.2 MEDIUM

6.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.5 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704	Patch
https://github.com/libusb/libusb/issues/1813	Issue Tracking Mitigation
https://github.com/libusb/libusb/pull/1814	Issue Tracking Patch
https://github.com/libusb/libusb/releases/tag/v1.0.30	Product Release Notes
https://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface	Patch Third Party Advisory
https://github.com/libusb/libusb/issues/1813	Issue Tracking Mitigation

Configurations

Configuration 1 (hide)

cpe:2.3:a:libusb:libusb:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-27 14:16

Updated : 2026-07-14 16:16

NVD link : CVE-2026-23679

Mitre link : CVE-2026-23679

CVE.ORG link : CVE-2026-23679

JSON object : View

Products Affected

libusb

libusb

CWE

CWE-125

Out-of-bounds Read

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