{"id":"CVE-2026-80994","title":"kernel: net: openvswitch: fix flow mask use-after-free on flow deletion (CVE-2026-80994)","summary":"A flaw was found in the Open vSwitch component of the Linux kernel. A local attacker could exploit a use-after-free vulnerability during flow deletion. This occurs due to a race condition where the flow mask is freed prematurely, allowing …","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-825","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T20:16:10+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80994.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80994.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80994"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532084"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80994"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80994"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80994.mbox"},{"url":"https://git.kernel.org/stable/c/ea5f7b45b582665541ddfb77dce98611354af4ab"},{"url":"https://git.kernel.org/stable/c/18ce1a8b7499c016d4a893d9b1db80608f73745d"},{"url":"https://git.kernel.org/stable/c/c15ef9a5bf594f93a31de2ec2ec394e2a903519a"},{"url":"https://git.kernel.org/stable/c/64051fe200c7c759af71634bd2123552eaabb69a"},{"url":"https://git.kernel.org/stable/c/0ba5cbc2f049af94ec94ff6f64958545efc5eaa2"},{"url":"https://git.kernel.org/stable/c/ac73e3af571da06c1d1cfe3f0f00dc978b851700"},{"url":"https://git.kernel.org/stable/c/7f072b84afd05a77963eb1872f7174e280661dce"},{"url":"https://git.kernel.org/stable/c/4e30317ff67a2eb12b4d890d39f72fd7e7117d48"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00159,"epssPercentile":0.05509,"scores":{"vendor":7,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-80994","body":"## Overview\n\nA flaw was found in the Open vSwitch component of the Linux kernel. A local attacker could exploit a use-after-free vulnerability during flow deletion. This occurs due to a race condition where the flow mask is freed prematurely, allowing subsequent operations to access deallocated memory. Successful exploitation of this flaw can lead to a system crash, resulting in 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 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80994.json)\n\n**kernel: net: openvswitch: fix flow mask use-after-free on flow deletion** — 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 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\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\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\nOut of support scope","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":204147,"id":"CVE-2026-80994","ts":1789490232840,"field":"cvss","old":"7.8","new":"7"},{"seq":183586,"id":"CVE-2026-80994","ts":1789356675993,"field":"cvss","old":"7.8","new":"4.1"},{"seq":183585,"id":"CVE-2026-80994","ts":1789356675993,"field":"severity","old":"high","new":"medium"},{"seq":153182,"id":"CVE-2026-80994","ts":1789285349443,"field":"cvss","old":null,"new":"7.8"},{"seq":153181,"id":"CVE-2026-80994","ts":1789285349443,"field":"severity","old":"none","new":"high"},{"seq":109576,"id":"CVE-2026-80994","ts":1789183732479,"field":"cvss","old":null,"new":"4.1"},{"seq":109575,"id":"CVE-2026-80994","ts":1789183732479,"field":"severity","old":"none","new":"medium"}]}