{"id":"CVE-2026-89623","title":"kernel: HID: mcp2221: stop device IO before hid_hw_stop (CVE-2026-89623)","summary":"A flaw was found in the Linux kernel's HID (Human Interface Device) mcp2221 driver. This vulnerability occurs when the device's input/output (IO) operations are not properly stopped before hardware teardown during device removal or probe f…","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":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-15","sourceUpdated":"2026-09-15T16:23:36+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89623.json","references":[{"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"},{"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"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00209,"epssPercentile":0.11323,"ingestedAt":"2026-09-14T15:23:07.450Z","slug":"CVE-2026-89623","body":"## Overview\n\nA flaw was found in the Linux kernel's HID (Human Interface Device) mcp2221 driver. This vulnerability occurs when the device's input/output (IO) operations are not properly stopped before hardware teardown during device removal or probe failure. This timing issue can lead to a use-after-free condition, where the system attempts to access memory that has already been released. Such a condition could result in system instability or a denial of service.\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)\n\n**kernel: HID: mcp2221: stop device IO before hid_hw_stop** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.\n\nAffected:\n\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred","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"}]}