{"id":"CVE-2026-80816","title":"kernel: ALSA: FCP: Use a private URB for the notification endpoint (CVE-2026-80816)","summary":"A flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ALSA) FireWire Control Protocol (FCP) driver. Incorrect handling of the Universal Serial Bus Request Block (URB) for the notification endpoint could lead to a system…","severity":"medium","cvss":4.6,"cvssVector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-476","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-04","updated":"2026-10-24","sourceUpdated":"2026-10-24T02:47:29+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80816.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80816.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80816"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528547"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80816"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80816"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80816.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-80816"},{"url":"https://git.kernel.org/stable/c/65aceb45ca91ddb7f7ed178821f481b34da35543"},{"url":"https://git.kernel.org/stable/c/5da21a434171e8ecf1d992c6f1d84c0c706fd395"},{"url":"https://git.kernel.org/stable/c/6db3c1d7e2872c9904e05ca8e0515920776a3c9c"},{"url":"https://git.kernel.org/stable/c/918b8d231c571c50a00efe92ffc8404a537a0490"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00209,"epssPercentile":0.10974,"ingestedAt":"2026-10-19T09:16:01.506Z","slug":"CVE-2026-80816","body":"## Overview\n\nA flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ALSA) FireWire Control Protocol (FCP) driver. Incorrect handling of the Universal Serial Bus Request Block (URB) for the notification endpoint could lead to a system crash. This occurs because the `fcp_init_notify()` function uses a shared URB, which can result in a zeroed wait head and subsequent system instability, potentially causing a denial of service (DoS).\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 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80816.json)\n\n**kernel: ALSA: FCP: Use a private URB for the notification endpoint** — rated Moderate by Red Hat. Released 2026-09-04, updated 2026-10-24.\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\nFix deferred\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":25,"depthScoreParts":{"impact":25.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228567,"id":"CVE-2026-80816","ts":1792844794506,"field":"cvss","old":null,"new":"4.6"},{"seq":228566,"id":"CVE-2026-80816","ts":1792844794506,"field":"severity","old":"none","new":"medium"}]}