{"id":"CVE-2026-98763","title":"kernel: usb: core: clear both ep_in and ep_out for non-ep0 control endpoints (CVE-2026-98763)","summary":"A flaw was found in the Linux kernel's USB subsystem. This vulnerability allows an attacker with physical access connecting a malicious USB device, or a local user with privileges to emulate USB hardware, to cause a Denial of Service (DoS)…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-825","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T05:34:02+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98763.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98763.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98763"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555121"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98763"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98763"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98763.mbox"},{"url":"https://git.kernel.org/stable/c/198d74dcfa129523125f46a89479d3b446b17dbe"},{"url":"https://git.kernel.org/stable/c/7a9f61476b0e8002092a52ee8295edeeb0a28d1e"},{"url":"https://git.kernel.org/stable/c/1da16c46b8d7101b74bc2d72a04e23cf5c7ddea1"},{"url":"https://git.kernel.org/stable/c/c50413ecb662ea43c7f487632c8114721743a277"},{"url":"https://git.kernel.org/stable/c/0e8baa78d872f2db440d8b9ded946ab8dceb89eb"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00168,"epssPercentile":0.05971,"ingestedAt":"2026-10-18T16:47:32.495Z","slug":"CVE-2026-98763","body":"## Overview\n\nA flaw was found in the Linux kernel's USB subsystem. This vulnerability allows an attacker with physical access connecting a malicious USB device, or a local user with privileges to emulate USB hardware, to cause a Denial of Service (DoS) or potentially execute arbitrary code. When disabling a bidirectional USB control endpoint, the kernel fails to clear pointers for both data directions, leading to a use-after-free condition when accessing the freed endpoint memory.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: 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 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98763.json)\n\n**kernel: usb: core: clear both ep_in and ep_out for non-ep0 control endpoints** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nOut of support scope","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":34.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228157,"id":"CVE-2026-98763","ts":1792758137456,"field":"cvss","old":null,"new":"6.2"},{"seq":228156,"id":"CVE-2026-98763","ts":1792758137456,"field":"severity","old":"none","new":"medium"}]}