libusb < 1.0.30 NULL Pointer Dereference in parse_interface()_CVE-2026-23679

6.9 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-23679

Source VulnCheck

Published May 27, 2026 at 13:21

Affected Product

Vendor libusb

Product libusb

Affected Versions libusb libusb 0

CWE Classification

CWE-125

References

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    "published": "2026-05-27T13:21:37.035Z",
    "modified": "2026-05-27T13:21:37.035Z",
    "type": "cve",
    "title": "libusb < 1.0.30 NULL Pointer Dereference in parse_interface()",
    "source": "VulnCheck",
    "references": "https://github.com/libusb/libusb/releases/tag/v1.0.30\nhttps://github.com/libusb/libusb/issues/1813\nhttps://github.com/libusb/libusb/pull/1814\nhttps://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704\nhttps://www.vulncheck.com/advisories/libusb-null-pointer-dereference-in-parse-interface",
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    "sourceData": "libusb libusb 0",
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    "cvss": {
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