{"id":"CVE-2026-80989","title":"kernel: net: thunderbolt: Mark the connection down when bringing it up fails (CVE-2026-80989)","summary":"A flaw was found in the Linux kernel's Thunderbolt networking subsystem. When a Thunderbolt connection fails to establish, the system may not correctly update its state, leading to repeated attempts to tear down an already inactive connect…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-1341","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T20:05:57+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80989.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80989.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80989"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532453"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80989"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80989"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80989.mbox"},{"url":"https://git.kernel.org/stable/c/e0d4a17afde5aa0045dc3e1d66c6bb80927bad8c"},{"url":"https://git.kernel.org/stable/c/ed1d6e3d735e7b03f43a02f4306c89eb7663da14"},{"url":"https://git.kernel.org/stable/c/f01e6a35c440b62f060e21f36b385e574a7f308c"},{"url":"https://git.kernel.org/stable/c/d6c0af293129345a17dc31c9b4179dc7f3d6af7a"},{"url":"https://git.kernel.org/stable/c/3c8b26ebf525ba5960510f48c6e9936a79ebe76f"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00338,"epssPercentile":0.27206,"scores":{"vendor":7,"cna":8.8},"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-80989","body":"## Overview\n\nA flaw was found in the Linux kernel's Thunderbolt networking subsystem. When a Thunderbolt connection fails to establish, the system may not correctly update its state, leading to repeated attempts to tear down an already inactive connection. This can result in a kernel warning and, under certain configurations, a system crash (Denial of Service). Additionally, this flaw could lead to the premature release of resources still in use, potentially causing system instability.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80989.json)\n\n**kernel: net: thunderbolt: Mark the connection down when bringing it up fails** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\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 8\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\n## Remediation\n\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":204155,"id":"CVE-2026-80989","ts":1789490234108,"field":"cvss","old":"8.8","new":"7"},{"seq":183582,"id":"CVE-2026-80989","ts":1789356675976,"field":"cvss","old":"8.8","new":"5.3"},{"seq":183581,"id":"CVE-2026-80989","ts":1789356675976,"field":"severity","old":"high","new":"medium"},{"seq":153176,"id":"CVE-2026-80989","ts":1789285349415,"field":"cvss","old":null,"new":"8.8"},{"seq":153175,"id":"CVE-2026-80989","ts":1789285349415,"field":"severity","old":"none","new":"high"},{"seq":147189,"id":"CVE-2026-80989","ts":1789270199961,"field":"cvss","old":null,"new":"5.3"},{"seq":147188,"id":"CVE-2026-80989","ts":1789270199961,"field":"severity","old":"none","new":"medium"},{"seq":108940,"id":"CVE-2026-80989","ts":1789183729636,"field":"cvss","old":null,"new":"5.3"},{"seq":108939,"id":"CVE-2026-80989","ts":1789183729636,"field":"severity","old":"none","new":"medium"}]}