libusb before version 1.0.30 contains a one-byte out-of-bounds read vulnerability in parse_iad_array() in descriptor.c that allows attackers to trigger a denial of service by supplying a malformed USB descriptor whose bLength equals size minus one, causing the bounds check to use the original buffer size instead of the remaining size. Attackers in virtualized environments with USB passthrough can supply crafted descriptors through libusb_get_active_interface_association_descriptors or libusb_get_interface_association_descriptors to read one byte past the end of the malloc allocation, resulting in a denial of service.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
libusb libusb affected
Version Status Constraints
0 affected < 1.0.30

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704 cve-icon cve-icon
https://github.com/libusb/libusb/issues/1813 cve-icon cve-icon
https://github.com/libusb/libusb/pull/1814 cve-icon cve-icon
https://github.com/libusb/libusb/releases/tag/v1.0.30 cve-icon cve-icon
https://www.vulncheck.com/advisories/libusb-out-of-bounds-read-in-parse-iad-array cve-icon cve-icon
History

Wed, 27 May 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 27 May 2026 14:15:00 +0000

Type Values Removed Values Added
Description libusb before version 1.0.30 contains a one-byte out-of-bounds read vulnerability in parse_iad_array() in descriptor.c that allows attackers to trigger a denial of service by supplying a malformed USB descriptor whose bLength equals size minus one, causing the bounds check to use the original buffer size instead of the remaining size. Attackers in virtualized environments with USB passthrough can supply crafted descriptors through libusb_get_active_interface_association_descriptors or libusb_get_interface_association_descriptors to read one byte past the end of the malloc allocation, resulting in a denial of service.
Title libusb < 1.0.30 Out-of-Bounds Read in parse_iad_array()
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-27T15:32:24.112Z

Reserved: 2026-05-18T19:22:26.748Z

Link: CVE-2026-47104

cve-icon Vulnrichment

Updated: 2026-05-27T15:32:21.260Z

cve-icon NVD

Status : Received

Published: 2026-05-27T14:17:32.590

Modified: 2026-05-27T14:17:32.590

Link: CVE-2026-47104

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses