Description
TinyUSB before 0.20.1 contains an integer underflow vulnerability in the HID host report descriptor parser tuh_hid_parse_report_descriptor() in src/class/hid/hid_host.c that allows a malicious USB device to trigger an out-of-bounds read by subtracting an item size from the remaining descriptor length without validating the item fits within the remaining buffer. Attackers can present a crafted USB device with a truncated report descriptor causing the uint16_t desc_len value to underflow, resulting in out-of-bounds memory reads and denial of service on the host system.
Published: 2026-11-03
Score: 5.2 Medium
EPSS: n/a
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Tue, 03 Nov 2026 20:30:00 +0000

Type Values Removed Values Added
Description TinyUSB before 0.20.1 contains an integer underflow vulnerability in the HID host report descriptor parser tuh_hid_parse_report_descriptor() in src/class/hid/hid_host.c that allows a malicious USB device to trigger an out-of-bounds read by subtracting an item size from the remaining descriptor length without validating the item fits within the remaining buffer. Attackers can present a crafted USB device with a truncated report descriptor causing the uint16_t desc_len value to underflow, resulting in out-of-bounds memory reads and denial of service on the host system.
Title TinyUSB < 0.20.1 Integer Underflow via HID Report Descriptor Parser
Weaknesses CWE-191
References
Metrics cvssV3_1

{'score': 5.2, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'}

cvssV4_0

{'score': 5.2, 'vector': 'CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-03T21:28:16.965Z

Reserved: 2026-07-10T15:43:36.625Z

Link: CVE-2026-61497

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-03T21:17:42.723

Modified: 2026-11-03T22:19:47.540

Link: CVE-2026-61497

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-191

    Integer Underflow (Wrap or Wraparound)