{"id":"CVE-2026-98596","title":"kernel: ipv6: Fix dst leak for uncached routes (CVE-2026-98596)","summary":"A flaw was found in the Linux kernel's IPv6 networking subsystem. A race condition during network device unregistration can lead to improper reference counting of uncached routes. A local attacker could exploit this flaw to cause an intern…","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-772","vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10","enterprise_linux 6"],"published":"2026-10-18","updated":"2026-10-20","sourceUpdated":"2026-10-20T05:00:38+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98596.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98596.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98596"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554984"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98596"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98596"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98596.mbox"},{"url":"https://git.kernel.org/stable/c/5045aa25f3790dcdb158a58ac60ccf8da42959aa"},{"url":"https://git.kernel.org/stable/c/ed902d5546fb9c142b3216d8eec914fa1bc0aa80"},{"url":"https://git.kernel.org/stable/c/f9722746df13a8a29103c847ef56b02c11ce0963"},{"url":"https://git.kernel.org/stable/c/be31fe6333f534155e6b408f1ef6d77974bb41aa"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00206,"epssPercentile":0.10481,"ingestedAt":"2026-10-18T15:45:12.246Z","slug":"CVE-2026-98596","body":"## Overview\n\nA flaw was found in the Linux kernel's IPv6 networking subsystem. A race condition during network device unregistration can lead to improper reference counting of uncached routes. A local attacker could exploit this flaw to cause an internal resource leak, leading to memory exhaustion 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 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98596.json)\n\n**kernel: ipv6: Fix dst leak for uncached routes** — 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\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\n\nNot affected:\n\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":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225714,"id":"CVE-2026-98596","ts":1792498383335,"field":"cvss","old":null,"new":"5.5"},{"seq":225713,"id":"CVE-2026-98596","ts":1792498383335,"field":"severity","old":"none","new":"medium"}]}