In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Validate channel ID when processing command completions MHI reads the channel ID from the event ring element sent by the device which can be any value between 0 and 255. In order to prevent any out of bound accesses, add a check against the maximum number of channels supported by the controller and those channels not configured yet so as to skip processing of that event ring element.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-988924 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    bus: mhi: core: Validate channel ID when processing command completions

    MHI reads the channel ID from the event ring element sent by the     device which can be any value between 0 and 255. In order to     prevent any out of bound accesses, add a check against the maximum     number of channels supported by the controller and those channels     not configured yet so as to skip processing of that event ring     element.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-987214 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    bus: mhi: core: Validate channel ID when processing command completions

    MHI reads the channel ID from the event ring element sent by the     device which can be any value between 0 and 255. In order to     prevent any out of bound accesses, add a check against the maximum     number of channels supported by the controller and those channels     not configured yet so as to skip processing of that event ring     element.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Validate channel ID     when processing command completions MHI reads the channel ID from the event ring element sent by the     device which can be any value between 0 and 255. In order to prevent any out of bound accesses, add a     check against the maximum number of channels supported by the controller and those channels not configured     yet so as to skip processing of that event ring element. (CVE-2021-47286)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
273161	Unity Linux 20.1070a Security Update: kernel (UTSA-2025-988924)	Nessus	Unity Linux Local Security Checks	high
268715	Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987214)	Nessus	Unity Linux Local Security Checks	high
247649	Linux Distros Unpatched Vulnerability : CVE-2021-47286	Nessus	Misc.	high

Detections

Analytics

CVE-2021-47286

high

Tenable Plugins

high

high

high