{"id":"CVE-2026-89739","title":"kernel: usb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition (CVE-2026-89739)","summary":"A flaw was found in the Linux kernel's USB dwc3 gadget driver. A race condition exists where a delayed operation might try to access memory that has already been freed. This can lead to a use-after-free vulnerability, which a local attacke…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-825","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T07:23:56+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89739.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89739.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89739"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532363"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89739"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89739"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89739.mbox"},{"url":"https://git.kernel.org/stable/c/448e95c0f3eaa8d99f16ccae92ab94545f14413b"},{"url":"https://git.kernel.org/stable/c/93e08b13a7a30e4e78556d993720e0bc36231ec7"},{"url":"https://git.kernel.org/stable/c/9c855832790cd488d87de1885974f4c37cfe7358"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00198,"epssPercentile":0.09836,"ingestedAt":"2026-09-14T11:11:19.885Z","slug":"CVE-2026-89739","body":"## Overview\n\nA flaw was found in the Linux kernel's USB dwc3 gadget driver. A race condition exists where a delayed operation might try to access memory that has already been freed. This can lead to a use-after-free vulnerability, which a local attacker could potentially exploit to cause a system crash (denial of service) or gain elevated privileges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89739.json)\n\n**kernel: usb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205485,"id":"CVE-2026-89739","ts":1789576721791,"field":"cvss","old":null,"new":"7"},{"seq":205484,"id":"CVE-2026-89739","ts":1789576721791,"field":"severity","old":"none","new":"high"}]}