{"id":"CVE-2026-98765","title":"kernel: USB: gadget: dummy-hcd: Fix wait for outstanding request completions (CVE-2026-98765)","summary":"A flaw was found in the Linux kernel's USB dummy Host Controller Driver (dummy-hcd). This vulnerability occurs because the driver fails to properly wait for active request completion callbacks before unbinding or unloading the module. A lo…","severity":"medium","cvss":4.1,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-366","vendor":"Red Hat","product":"Linux","affected":["Linux >= 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 < 6849e51b89de5b6fc7447dc8e612b58df19c7dea","Linux >= 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 < 7ce4dca0d53b1c3cb2b7e7bb2e42bf5db860caf2","Linux >= 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 < 5298c96bf0068f3160969f7ddad81976d01a9b66","Linux >= 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 < 3070806a7bc7bb36ed04a21022c09dafcc5619f4","Linux >= 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 < b263ff9b0fc5c1f371d65c4eb196b31263d039ff","Linux 7b416b9dac6ede26d4ca0c1a88b448b543623ff3","Linux 8590bc1da625dd4a589eac0fc3aa3cf4f400424d","Linux a867d5b932ac4911d3f8a1e63505061b0c81f889","Linux e84b4a008365b7edbd842a063ae28d040a98db25","Linux e39b17143a5b5aac81f066d455e5d3a9877eb3ae","Linux 4f8ae1fcb0dfbb72a7678f81bf01fb7fc85c6715","Linux >= 3.2.97 < 3.3","Linux >= 3.16.52 < 3.17","Linux >= 4.1.46 < 4.2","Linux >= 4.4.92 < 4.5","Linux >= 4.9.55 < 4.10","Linux >= 4.13.6 < 4.14","Linux 4.14"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T05:43:35+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98765.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98765.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98765"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555098"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98765"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98765"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98765.mbox"},{"url":"https://git.kernel.org/stable/c/6849e51b89de5b6fc7447dc8e612b58df19c7dea"},{"url":"https://git.kernel.org/stable/c/7ce4dca0d53b1c3cb2b7e7bb2e42bf5db860caf2"},{"url":"https://git.kernel.org/stable/c/5298c96bf0068f3160969f7ddad81976d01a9b66"},{"url":"https://git.kernel.org/stable/c/3070806a7bc7bb36ed04a21022c09dafcc5619f4"},{"url":"https://git.kernel.org/stable/c/b263ff9b0fc5c1f371d65c4eb196b31263d039ff"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00168,"epssPercentile":0.05971,"ingestedAt":"2026-10-18T16:47:32.496Z","slug":"CVE-2026-98765","body":"## Overview\n\nA flaw was found in the Linux kernel's USB dummy Host Controller Driver (dummy-hcd). This vulnerability occurs because the driver fails to properly wait for active request completion callbacks before unbinding or unloading the module. A local attacker could trigger this race condition, leading to invalid memory access and causing a kernel crash that results in a Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98765.json)\n\n**kernel: USB: gadget: dummy-hcd: Fix wait for outstanding request completions** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.\n\nNot affected:\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\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":22.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228151,"id":"CVE-2026-98765","ts":1792758135192,"field":"cvss","old":null,"new":"4.1"},{"seq":228150,"id":"CVE-2026-98765","ts":1792758135192,"field":"severity","old":"none","new":"medium"}]}