Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libusb | Libusb | < 1.0.30 |
Related Weaknesses (CWE)
References
- https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704Patch
- https://github.com/libusb/libusb/issues/1813Issue TrackingMitigation
- https://github.com/libusb/libusb/pull/1814Issue TrackingPatch
- https://github.com/libusb/libusb/releases/tag/v1.0.30ProductRelease Notes
- https://www.vulncheck.com/advisories/libusb-out-of-bounds-read-in-parse-iad-arraPatchThird Party Advisory
FAQ
What is CVE-2026-47104?
CVE-2026-47104 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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...
How severe is CVE-2026-47104?
CVE-2026-47104 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-47104?
Check the references section above for vendor advisories and patch information. Affected products include: Libusb Libusb.