{"id":"CVE-2026-89733","title":"kernel: usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind() (CVE-2026-89733)","summary":"A flaw was found in the Linux kernel's USB Video Class (UVC) gadget driver. This vulnerability occurs in the `uvc_function_bind()` and `uvc_function_unbind()` functions, where pointers to freed memory are not properly cleared. This can lea…","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":"Linux","affected":["Linux >= 0f9df939385527049c8062a099fbfa1479fe7ce0 < ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2","Linux >= 0f9df939385527049c8062a099fbfa1479fe7ce0 < 85dd5e8bd6776d02854f2847d83429f1f712e99c","Linux >= 0f9df939385527049c8062a099fbfa1479fe7ce0 < 502a7f5b79b7ba751988789e982924f8f496129f","Linux >= 0f9df939385527049c8062a099fbfa1479fe7ce0 < bec7708eb3b5295d12e931db24381b7c94c72953","Linux >= 0f9df939385527049c8062a099fbfa1479fe7ce0 < 8e88ed8a374de67270d38689f2a81018909cafbb","Linux >= 0f9df939385527049c8062a099fbfa1479fe7ce0 < 9897b7da8c0ad8356c1b8649379fcb5a689462cb","Linux >= 0f9df939385527049c8062a099fbfa1479fe7ce0 < 38f822ddce9355893d734279a26ddec45182197e","Linux >= 0f9df939385527049c8062a099fbfa1479fe7ce0 < bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc","Linux 1efa8a5aac93d9e67075995d7d4902b57ce184f7","Linux e7a4b0efe62e56a0acc81d16091c6efc2a282be8","Linux 065f5561a20659cf17aae5f72b32b5c2695c8e00","Linux >= 3.2.36 < 3.3","Linux >= 3.4.25 < 3.5","Linux >= 3.7.2 < 3.8","Linux 3.8"],"published":"2026-09-11","updated":"2026-09-21","sourceUpdated":"2026-09-21T17:28:00+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89733.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89733.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89733"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532203"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89733"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89733"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89733.mbox"},{"url":"https://git.kernel.org/stable/c/ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2"},{"url":"https://git.kernel.org/stable/c/85dd5e8bd6776d02854f2847d83429f1f712e99c"},{"url":"https://git.kernel.org/stable/c/502a7f5b79b7ba751988789e982924f8f496129f"},{"url":"https://git.kernel.org/stable/c/bec7708eb3b5295d12e931db24381b7c94c72953"},{"url":"https://git.kernel.org/stable/c/8e88ed8a374de67270d38689f2a81018909cafbb"},{"url":"https://git.kernel.org/stable/c/9897b7da8c0ad8356c1b8649379fcb5a689462cb"},{"url":"https://git.kernel.org/stable/c/38f822ddce9355893d734279a26ddec45182197e"},{"url":"https://git.kernel.org/stable/c/bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00164,"epssPercentile":0.06097,"scores":{"vendor":5.5,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.449Z","slug":"CVE-2026-89733","body":"## Overview\n\nA flaw was found in the Linux kernel's USB Video Class (UVC) gadget driver. This vulnerability occurs in the `uvc_function_bind()` and `uvc_function_unbind()` functions, where pointers to freed memory are not properly cleared. This can lead to a use-after-free (UAF) condition, potentially allowing an attacker to corrupt memory, which may result in a denial of service or arbitrary code execution.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89733.json)\n\n**kernel: usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-21.\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":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":208960,"id":"CVE-2026-89733","ts":1790062299787,"field":"cvss","old":"7.8","new":"5.5"},{"seq":208959,"id":"CVE-2026-89733","ts":1790062299787,"field":"severity","old":"high","new":"medium"},{"seq":197689,"id":"CVE-2026-89733","ts":1789384318418,"field":"cvss","old":"4.6","new":"7.8"},{"seq":197688,"id":"CVE-2026-89733","ts":1789384318418,"field":"severity","old":"medium","new":"high"},{"seq":183843,"id":"CVE-2026-89733","ts":1789356677638,"field":"cvss","old":"7.8","new":"4.6"},{"seq":183842,"id":"CVE-2026-89733","ts":1789356677638,"field":"severity","old":"high","new":"medium"},{"seq":153618,"id":"CVE-2026-89733","ts":1789285351525,"field":"cvss","old":null,"new":"7.8"},{"seq":153617,"id":"CVE-2026-89733","ts":1789285351525,"field":"severity","old":"none","new":"high"},{"seq":147542,"id":"CVE-2026-89733","ts":1789270211316,"field":"cvss","old":null,"new":"4.6"},{"seq":147541,"id":"CVE-2026-89733","ts":1789270211316,"field":"severity","old":"none","new":"medium"},{"seq":109300,"id":"CVE-2026-89733","ts":1789183731338,"field":"cvss","old":null,"new":"4.6"},{"seq":109299,"id":"CVE-2026-89733","ts":1789183731338,"field":"severity","old":"none","new":"medium"}]}