{"id":"CVE-2026-98598","title":"kernel: ipv6: Prevent rt6_insert_exception() for dying fib6_info (CVE-2026-98598)","summary":"A flaw was found in the Linux kernel's IPv6 networking subsystem. A local attacker or network traffic triggering route exceptions while an IPv6 route is being removed can cause a circular reference leak. This failure to release resources p…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-772","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-20","sourceUpdated":"2026-10-20T05:12:15+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98598.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98598.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98598"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554961"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98598"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98598"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98598.mbox"},{"url":"https://git.kernel.org/stable/c/649ffc76ed5483b2caf35ed90d3787538efc4e53"},{"url":"https://git.kernel.org/stable/c/e03e77071e75ce726d877f0a4349a28b6e1f487a"},{"url":"https://git.kernel.org/stable/c/0346ec2f080b40d95ed05b853bb9226289e75212"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00198,"epssPercentile":0.09465,"ingestedAt":"2026-10-18T15:45:12.245Z","slug":"CVE-2026-98598","body":"## Overview\n\nA flaw was found in the Linux kernel's IPv6 networking subsystem. A local attacker or network traffic triggering route exceptions while an IPv6 route is being removed can cause a circular reference leak. This failure to release resources prevents network devices from unregistering, resulting in stalled operations and 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 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98598.json)\n\n**kernel: ipv6: Prevent rt6_insert_exception() for dying fib6_info** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\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 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nOut of support scope","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225708,"id":"CVE-2026-98598","ts":1792498381671,"field":"cvss","old":null,"new":"4.7"},{"seq":225707,"id":"CVE-2026-98598","ts":1792498381671,"field":"severity","old":"none","new":"medium"}]}