CVE-2026-47104
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine without logging in. Limited direct impact.
- Exploit odds
- 0.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.1% in the next 30 days (EPSS).
- Severity: 5.1 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.1% · EPSS, next 30 days
- Weakness
- CWE-125 · Out-of-bounds read
- Record status
- Analyzed
Affected
- Libusb < 1.0.30
Attack profile CVSS 4.0 · 5.1
- Attack vector
- Local
- Complexity
- Low
- Attack requirements
- None
- Privileges needed
- None
- User interaction
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Raw 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-47104.md and follow it. Check whether this project is affected by CVE-2026-47104. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704
- https://github.com/libusb/libusb/issues/1813
- https://github.com/libusb/libusb/pull/1814
- https://github.com/libusb/libusb/releases/tag/v1.0.30
- https://www.vulncheck.com/advisories/libusb-out-of-bounds-read-in-parse-iad-array
References
- https://github.com/libusb/libusb/commit/578ab76b4c434f8b204137ab6d7310689c7a9704
- https://github.com/libusb/libusb/issues/1813
- https://github.com/libusb/libusb/pull/1814
- https://github.com/libusb/libusb/releases/tag/v1.0.30
- https://www.vulncheck.com/advisories/libusb-out-of-bounds-read-in-parse-iad-array