CVE-2022-29223

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    CVE-2022-29223

    Published: 24 May 2022Last Modified: 12 Aug 2026

    Summary: Buffer overflow on HUB descriptor in Azure RTOS USBX

    Details: 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.

    References: https://github.com/azure-rtos/usbx/releases/tag/v6.1.10_rel, https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/29xxx/CVE-2022-29223.json, https://github.com/azure-rtos/usbx/security/advisories/GHSA-2qc5-385m-x862, https://nvd.nist.gov/vuln/detail/CVE-2022-29223

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -8f56ef4e4492dd66c2161b7c1534c6f4442852a4

    Affected versions

    v6.1.9_rel
    v6.1.8_rel
    v6.1.7_rel
    v6.1.6_rel
    v6.1.5_rel
    v6.1.4_rel
    v6.1.3_rel
    v6.1.2_rel

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2022-29223 | CVE-DB