HID: mcp2221: stop device IO before hid_hw_stop
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 1 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.6.157
- Fix · CNA Linux (Linux) Fixed in 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 6 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89623
- 2026-10-03 Alias added: GHSA-p59v-m859-4ppq
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-24 Fix available: Linux/Linux@0 · CNA
- 2026-11-06 Affected versions changed · Red Hat
References
Other 5
- https://git.kernel.org/stable/c/85d963499f1feeea287c0a37c3eac3fc1898eca9
- https://git.kernel.org/stable/c/0ae90a19e6b5a8557d25d95facb7e01c9c07af38
- https://git.kernel.org/stable/c/c99ba6c234d4d537c317336376b78c088174034a
- https://git.kernel.org/stable/c/2eda1513f573945c1e3a0090341f3d28740463b1
- https://git.kernel.org/stable/c/dca151633c0fde90935311c60e7cfc064aa56134
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Sources
- CVE-2026-89623 · CVE Program
- CVE-2026-89623 · NVD
- FIRST EPSS
- GHSA-p59v-m859-4ppq · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89623 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences