In the Linux kernel, the following vulnerability has been resolved: HID: mcp2221: stop device IO before hid_hw_stop Quiesce device IO at the start of the devm cleanup callback mcp2221_hid_unregister() so that incoming HID reports cannot race with hardware teardown during probe failure or device removal, addressing a potential use-after-free. Guard the call to hid_device_io_stop() with io_started. On normal removal hid_device_remove() has already cleared io_started before the devres group is released, so an unconditional call would otherwise hit the !io_started path and emit a spurious "io already stopped" warning on every removal. The guard preserves the probe-failure balancing, where io_started is still set after hid_device_io_start(), while staying silent on the normal removal path.

An update of the linux package has been released.

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

  - HID: mcp2221: stop device IO before hid_hw_stop Quiesce device IO at the start of the devm cleanup     callback mcp2221_hid_unregister() so that incoming HID reports cannot race with hardware teardown during     probe failure or device removal, addressing a potential use-after-free. Guard the call to     hid_device_io_stop() with io_started. On normal removal hid_device_remove() has already cleared io_started     before the devres group is released, so an unconditional call would otherwise hit the !io_started path and     emit a spurious io already stopped warning on every removal. The guard preserves the probe-failure     balancing, where io_started is still set after hid_device_io_start(), while staying silent on the normal     removal path. (CVE-2026-89623)

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

ID	Name	Product	Family	Type	Severity
375048	Photon OS 5.0: Linux PHSA-2026-5.0-92-0999	Nessus	PhotonOS Local Security Checks	Local	high
375011	Photon OS 5.0: Linux PHSA-2026-5.0-91-0999	Nessus	PhotonOS Local Security Checks	Local	high
345257	Linux Distros Unpatched Vulnerability : CVE-2026-89623	Nessus	Misc.	Local	high

Detections

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CVE-2026-89623

high

Tenable Plugins

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high

high