{"id":"CVE-2026-89623","title":"HID: mcp2221: stop device IO before hid_hw_stop","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: stop device IO before hid_hw_stop\n\nQuiesce device IO at the start of the devm cleanup callback\nmcp2221_hid_unregister() so that incoming HID reports canno…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-825"],"vendor":"Linux","product":"Linux","affected":["Linux >= d4b50ac06ea6e47bdd2b04e97d1090c673c80645 < 85d963499f1feeea287c0a37c3eac3fc1898eca9","Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < 0ae90a19e6b5a8557d25d95facb7e01c9c07af38","Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < c99ba6c234d4d537c317336376b78c088174034a","Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < 2eda1513f573945c1e3a0090341f3d28740463b1","Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < dca151633c0fde90935311c60e7cfc064aa56134","Linux >= 6.6.8 < 6.6.157","Linux 6.7"],"published":"2026-09-11","updated":"2026-10-24","sourceUpdated":"2026-10-24T14:14:00.813Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89623","references":[{"url":"https://git.kernel.org/stable/c/85d963499f1feeea287c0a37c3eac3fc1898eca9"},{"url":"https://git.kernel.org/stable/c/0ae90a19e6b5a8557d25d95facb7e01c9c07af38"},{"url":"https://git.kernel.org/stable/c/c99ba6c234d4d537c317336376b78c088174034a"},{"url":"https://git.kernel.org/stable/c/2eda1513f573945c1e3a0090341f3d28740463b1"},{"url":"https://git.kernel.org/stable/c/dca151633c0fde90935311c60e7cfc064aa56134"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89623.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89623"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532125"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89623"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89623"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89623.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00209,"epssPercentile":0.10938,"ingestedAt":"2026-09-14T15:23:07.450Z","slug":"CVE-2026-89623","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: stop device IO before hid_hw_stop\n\nQuiesce device IO at the start of the devm cleanup callback\nmcp2221_hid_unregister() so that incoming HID reports cannot race with\nhardware teardown during probe failure or device removal, addressing a\npotential use-after-free.\n\nGuard the call to hid_device_io_stop() with io_started. On normal\nremoval hid_device_remove() has already cleared io_started before the\ndevres group is released, so an unconditional call would otherwise hit\nthe !io_started path and emit a spurious \"io already stopped\" warning\non every removal. The guard preserves the probe-failure balancing,\nwhere io_started is still set after hid_device_io_start(), while\nstaying silent on the normal removal path.\n\n## Affected\n\n- `Linux >= d4b50ac06ea6e47bdd2b04e97d1090c673c80645 < 85d963499f1feeea287c0a37c3eac3fc1898eca9`\n- `Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < 0ae90a19e6b5a8557d25d95facb7e01c9c07af38`\n- `Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < c99ba6c234d4d537c317336376b78c088174034a`\n- `Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < 2eda1513f573945c1e3a0090341f3d28740463b1`\n- `Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < dca151633c0fde90935311c60e7cfc064aa56134`\n- `Linux >= 6.6.8 < 6.6.157`\n- `Linux 6.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89623.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":204097,"id":"CVE-2026-89623","ts":1789490231423,"field":"cvss","old":null,"new":"5.5"},{"seq":204096,"id":"CVE-2026-89623","ts":1789490231423,"field":"severity","old":"none","new":"medium"},{"seq":147712,"id":"CVE-2026-89623","ts":1789270211981,"field":"cvss","old":null,"new":"3.9"},{"seq":147711,"id":"CVE-2026-89623","ts":1789270211981,"field":"severity","old":"none","new":"low"},{"seq":109454,"id":"CVE-2026-89623","ts":1789183731976,"field":"cvss","old":null,"new":"3.9"},{"seq":109453,"id":"CVE-2026-89623","ts":1789183731976,"field":"severity","old":"none","new":"low"}]}