{"id":"CVE-2026-80954","title":"kernel: i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode() (CVE-2026-80954)","summary":"A flaw was found in the Linux kernel's i3c driver. The `i3c_device_get_supported_xfer_mode()` function attempts to access a device descriptor without holding the necessary lock. This unlocked dereference can lead to memory corruption, pote…","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-476","vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T17:36:10+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80954.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80954.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80954"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532524"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80954"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80954"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80954.mbox"},{"url":"https://git.kernel.org/stable/c/251db58324ea4792c3f9f692ab09be148e051969"},{"url":"https://git.kernel.org/stable/c/8bed7f4fa710914b7f05fd59998316bfb4d43385"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00165,"epssPercentile":0.0505,"scores":{"vendor":4.4,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.476Z","slug":"CVE-2026-80954","body":"## Overview\n\nA flaw was found in the Linux kernel's i3c driver. The `i3c_device_get_supported_xfer_mode()` function attempts to access a device descriptor without holding the necessary lock. This unlocked dereference can lead to memory corruption, potentially causing system instability or 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-2026-80954.json)\n\n**kernel: i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode()** — 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":204237,"id":"CVE-2026-80954","ts":1789490240464,"field":"cvss","old":"4.4","new":"5.5"},{"seq":202941,"id":"CVE-2026-80954","ts":1789403733040,"field":"cvss","old":"7.8","new":"4.4"},{"seq":202940,"id":"CVE-2026-80954","ts":1789403733040,"field":"severity","old":"high","new":"medium"},{"seq":183616,"id":"CVE-2026-80954","ts":1789356676117,"field":"cvss","old":"7.8","new":"4.4"},{"seq":183615,"id":"CVE-2026-80954","ts":1789356676117,"field":"severity","old":"high","new":"medium"},{"seq":153138,"id":"CVE-2026-80954","ts":1789285349199,"field":"cvss","old":null,"new":"7.8"},{"seq":153137,"id":"CVE-2026-80954","ts":1789285349199,"field":"severity","old":"none","new":"high"},{"seq":147069,"id":"CVE-2026-80954","ts":1789270195037,"field":"cvss","old":null,"new":"4.4"},{"seq":147068,"id":"CVE-2026-80954","ts":1789270195037,"field":"severity","old":"none","new":"medium"}]}