{"id":"CVE-2026-80966","title":"kernel: ALSA: portman2x4: Check card index validity at probe (CVE-2026-80966)","summary":"A flaw was found in the ALSA portman2x4 driver of the Linux kernel. This vulnerability occurs because the driver does not properly validate the card index, specifically failing to check for negative ID values. A local attacker could exploi…","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-125","vendor":"Red Hat","product":"Linux","affected":["Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 45ea0707298798678a60ff861b695aea049a5469","Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 5d7ac5e9ee5ba76b567ace13b46075caf79dcca0","Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 0048994854f3e9c57b7a754de43ef8da5818d140","Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 64898e9bd8b7b229efa8642b85b56b326a6ec3dc","Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 0ce391090809d610647f424b9b1dc24aa2c546fd","Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < d7ef7890e3e35b4ba09e76fc6b72047a1599a5e8","Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < e1ce8ad1009b1736b3044b3324350dcfdd516f42","Linux >= 757e119bf52b014b3181eed97b01f87a245b8ff9 < 3690ef20469d5959378260e2752f2314a2572913","Linux 2.6.21"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T18:25:18+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80966.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80966.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80966"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532285"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80966"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80966"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80966.mbox"},{"url":"https://git.kernel.org/stable/c/45ea0707298798678a60ff861b695aea049a5469"},{"url":"https://git.kernel.org/stable/c/5d7ac5e9ee5ba76b567ace13b46075caf79dcca0"},{"url":"https://git.kernel.org/stable/c/0048994854f3e9c57b7a754de43ef8da5818d140"},{"url":"https://git.kernel.org/stable/c/64898e9bd8b7b229efa8642b85b56b326a6ec3dc"},{"url":"https://git.kernel.org/stable/c/0ce391090809d610647f424b9b1dc24aa2c546fd"},{"url":"https://git.kernel.org/stable/c/d7ef7890e3e35b4ba09e76fc6b72047a1599a5e8"},{"url":"https://git.kernel.org/stable/c/e1ce8ad1009b1736b3044b3324350dcfdd516f42"},{"url":"https://git.kernel.org/stable/c/3690ef20469d5959378260e2752f2314a2572913"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.0021,"epssPercentile":0.11539,"ingestedAt":"2026-09-14T15:23:07.455Z","slug":"CVE-2026-80966","body":"## Overview\n\nA flaw was found in the ALSA portman2x4 driver of the Linux kernel. This vulnerability occurs because the driver does not properly validate the card index, specifically failing to check for negative ID values. A local attacker could exploit this by providing a negative ID value via sysfs, leading to an out-of-bounds memory access. This could potentially result in system instability or information disclosure.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80966.json)\n\n**kernel: ALSA: portman2x4: Check card index validity at probe** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.\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":204213,"id":"CVE-2026-80966","ts":1789490240206,"field":"cvss","old":null,"new":"5.5"},{"seq":204212,"id":"CVE-2026-80966","ts":1789490240206,"field":"severity","old":"none","new":"medium"},{"seq":147446,"id":"CVE-2026-80966","ts":1789270210940,"field":"cvss","old":null,"new":"5.8"},{"seq":147445,"id":"CVE-2026-80966","ts":1789270210940,"field":"severity","old":"none","new":"medium"},{"seq":109202,"id":"CVE-2026-80966","ts":1789183730708,"field":"cvss","old":null,"new":"5.8"},{"seq":109201,"id":"CVE-2026-80966","ts":1789183730708,"field":"severity","old":"none","new":"medium"}]}