CVE-2026-61497
TinyUSB < 0.21.0 Integer Underflow via HID Report Descriptor Parser
TinyUSB before 0.21.0 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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| TinyUSB hathach hathach/tinyusb
github |
≥ 0; < 0.21.0 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.2 medium |
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 | CNA: VulnCheck |
| 3.1 / 5.2 medium |
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H | CNA: VulnCheck |
| 4.0 / 5.2 medium |
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/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 | NVD: [email protected] |
| 3.1 / 5.2 medium |
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H | NVD: [email protected] |
Exploit evidence
- https://gist.github.com/Shukhrat-03/8fe6e5881614a7f86b5d2b87d44ea706
exploit · CNA: VulnCheck
References
- https://github.com/hathach/tinyusb/releases/tag/0.21.0CNA: VulnCheck · patch, release-notes
- https://github.com/hathach/tinyusb/commit/85047e1777f5c20b7a936aa905c746125d3ed066CNA: VulnCheck · issue-tracking, patch
- https://www.vulncheck.com/advisories/tinyusb-integer-underflow-via-hid-report-descriptor-parserCNA: VulnCheck · third-party-advisory
- https://gist.github.com/Shukhrat-03/8fe6e5881614a7f86b5d2b87d44ea706CNA: VulnCheck · technical-description, exploit
- https://github.com/hathach/tinyusb/commit/85047e1777f5c20b7a936aa905c746125d3ed066[email protected]
- https://github.com/hathach/tinyusb/releases/tag/0.21.0[email protected]
- https://www.vulncheck.com/advisories/tinyusb-integer-underflow-via-hid-report-descriptor-parser[email protected]
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