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TI-2022-11766 Aliases CVE-2022-29223

Buffer overflow on HUB descriptor in Azure RTOS USBX

Priority MEDIUM 51CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

Azure RTOS USBX is a USB host, device, and on-the-go (OTG) embedded stack. In versions prior to 6.1.10, an attacker can cause a buffer overflow by providing the Azure RTOS USBX host stack a HUB descriptor with `bNbPorts` set to a value greater than `UX_MAX_TT` which defaults to 8. For a `bNbPorts` value of 255, the implementation of `ux_host_class_hub_descriptor_get` function will modify the contents of `hub` -> `ux_host_class_hub_device` -> `ux_device_hub_tt` array violating the end boundary by 255 - `UX_MAX_TT` items. The USB host stack needs to validate the number of ports reported by the hub, and if the value is larger than UX_MAX_TT, USB stack needs to reject the request. This fix has been included in USBX release 6.1.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01234 69th percentileScored 2026-11-07
Fix Fixed usbx (azure-rtos): 6.1.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
azure-rtosusbxbefore 6.1.106.1.10Patch availableCNA
  • usbx Vendorazure-rtos Affected before 6.1.10 Fixed in 6.1.10 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:eclipse:threadx_usbx:*:*:*:*:*:*:*:*before 6.1.10VulnerableEclipse Foundation
  • cpe:2.3:a:eclipse:threadx_usbx:*:*:*:*:*:*:*:* Versions before 6.1.10 Vulnerable ·Eclipse Foundation

Remediation

  • Fix · CNA usbx (azure-rtos) Fixed in 6.1.10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-29223

References

Advisory 2

  • TI-2022-16486 USBX Host CDC ECM integer underflow with buffer overflow CVSS 3.1CRITICAL 9.8
  • TI-2022-11787 Potential buffer overflow in function DFU upload in Azure RTOS USBX CVSS 3.1CRITICAL 9.8
  • TI-2022-18669 Azure RTOS USBX Host PIMA vulnerable to read integer underflow with buffer overflow CVSS 3.1CRITICAL 9.8
  • TI-2023-26533 Azure RTOS USBX Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2023-26537 Azure RTOS USBX Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2023-26536 Azure RTOS USBX Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences