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CVE-2026-89623

UnknownEPSS 0.21%

Last modified

CVE-2026-89623 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.21%

11.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= d4b50ac06ea6e47bdd2b04e97d1090c673c80645, < 85d963499f1feeea287c0a37c3eac3fc1898eca9; >= d4b50ac06ea6e47bdd2b04e97d1090c673c80645, < 0ae90a19e6b5a8557d25d95facb7e01c9c07af38; >= d4b50ac06ea6e47bdd2b04e97d1090c673c80645, < c99ba6c234d4d537c317336376b78c088174034a; >= d4b50ac06ea6e47bdd2b04e97d1090c673c80645, < 2eda1513f573945c1e3a0090341f3d28740463b1; >= d4b50ac06ea6e47bdd2b04e97d1090c673c80645, < dca151633c0fde90935311c60e7cfc064aa56134
LinuxLinux>= 6.6.8, < 6.6.157; >= 6.6.8, < 6.12.109; >= 6.6.8, < 6.18.50; >= 6.6.8, < 7.2.4; >= 6.6.8, < 7.3-rc1

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89623?
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.
How severe is CVE-2026-89623?
Severity scoring for CVE-2026-89623 is pending analysis. The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-89623?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST