{"id":"CVE-2026-80965","title":"kernel: ALSA: serial-u16550: Check card index validity at probe (CVE-2026-80965)","summary":"A flaw was found in the Linux kernel's ALSA serial-u16550 driver. This vulnerability occurs because the driver does not properly validate the card index when a device is manually bound via the sysfs interface. A local user could exploit th…","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-805","vendor":"Red Hat","product":"Linux","affected":["Linux >= 9caf6b5908e1e3b10478e9201ca1be809145253f < 41a952304cc8a308748e3f58462c879f2a9c4340","Linux >= 9caf6b5908e1e3b10478e9201ca1be809145253f < cc0f757d017f4271f137c77e130314bb23792347","Linux >= 9caf6b5908e1e3b10478e9201ca1be809145253f < 1cb30691dc893aafcbc1e211e94764014c0f5d12","Linux >= 9caf6b5908e1e3b10478e9201ca1be809145253f < 487ede9b648fc0eb15866f408c41aac2c57f85d5","Linux >= 9caf6b5908e1e3b10478e9201ca1be809145253f < fbf3fb097e66fc1874e54ecc46d600d9325480d6","Linux >= 9caf6b5908e1e3b10478e9201ca1be809145253f < 7555e83d7738e65dc83921e3c85bbdc081f08f2f","Linux >= 9caf6b5908e1e3b10478e9201ca1be809145253f < 6d6fdb24fe2eaf6174fc502284c6e1dc5f7242ba","Linux >= 9caf6b5908e1e3b10478e9201ca1be809145253f < e0fb960b227fcdebe22e4f26c9486d60943c0424","Linux 2.6.16"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T18:25:14+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80965.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80965.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80965"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532257"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80965"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80965"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80965.mbox"},{"url":"https://git.kernel.org/stable/c/41a952304cc8a308748e3f58462c879f2a9c4340"},{"url":"https://git.kernel.org/stable/c/cc0f757d017f4271f137c77e130314bb23792347"},{"url":"https://git.kernel.org/stable/c/1cb30691dc893aafcbc1e211e94764014c0f5d12"},{"url":"https://git.kernel.org/stable/c/487ede9b648fc0eb15866f408c41aac2c57f85d5"},{"url":"https://git.kernel.org/stable/c/fbf3fb097e66fc1874e54ecc46d600d9325480d6"},{"url":"https://git.kernel.org/stable/c/7555e83d7738e65dc83921e3c85bbdc081f08f2f"},{"url":"https://git.kernel.org/stable/c/6d6fdb24fe2eaf6174fc502284c6e1dc5f7242ba"},{"url":"https://git.kernel.org/stable/c/e0fb960b227fcdebe22e4f26c9486d60943c0424"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00176,"epssPercentile":0.07426,"ingestedAt":"2026-09-14T15:23:07.455Z","slug":"CVE-2026-80965","body":"## Overview\n\nA flaw was found in the Linux kernel's ALSA serial-u16550 driver. This vulnerability occurs because the driver does not properly validate the card index when a device is manually bound via the sysfs interface. A local user could exploit this by providing an invalid card index, leading to an out-of-bounds memory access. This could result in a system crash, causing a denial of service.\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-2026-80965.json)\n\n**kernel: ALSA: serial-u16550: 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":204217,"id":"CVE-2026-80965","ts":1789490240240,"field":"cvss","old":null,"new":"5.5"},{"seq":204216,"id":"CVE-2026-80965","ts":1789490240240,"field":"severity","old":"none","new":"medium"},{"seq":147488,"id":"CVE-2026-80965","ts":1789270211105,"field":"cvss","old":null,"new":"4.1"},{"seq":147487,"id":"CVE-2026-80965","ts":1789270211105,"field":"severity","old":"none","new":"medium"},{"seq":109236,"id":"CVE-2026-80965","ts":1789183731091,"field":"cvss","old":null,"new":"4.1"},{"seq":109235,"id":"CVE-2026-80965","ts":1789183731091,"field":"severity","old":"none","new":"medium"}]}