# CVE-2026-47104: libusb < 1.0.30 Out-of-Bounds Read in parse_iad_array()

CVE-2026-47104 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-47104, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-47104
- Priority: Routine
- CVSS: 5.5 (Low)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 27, 2026
- Weakness: Out-of-bounds Read
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47104

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libusb-1.0 Debian 14 | 2:1.0.30-1 | [DEBIAN-CVE-2026-47104](https://patchblox.com/security/data/fix/linux/debian-cve-2026-47104.md) | Jun 24, 2026 |
| Linux | libusb-1_0 opensuse-leap 16.0 | 1.0.28-160000.3.1 | [OPENSUSE-SU-2026:21783-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21783-1.md) | Sep 7, 2026 |
| Linux | libusb-1_0 sles 16.0 | 1.0.28-160000.3.1 | [SUSE-SU-2026:23660-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23660-1.md) | Sep 7, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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