{"id":"CVE-2026-98595","title":"kernel: udp: remove a disconnected socket from the 4-tuple hash table (CVE-2026-98595)","summary":"A flaw was found in the Linux kernel's UDP networking subsystem. When a connected User Datagram Protocol (UDP) socket bound to a specific address is disconnected, the kernel fails to remove the socket entry from its internal connection loo…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","cvssSource":"vendor","cwe":"CWE-459","vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","affected":["enterprise_linux 6"],"published":"2026-10-18","updated":"2026-10-20","sourceUpdated":"2026-10-20T04:55:17+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98595.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98595.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98595"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554968"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98595"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98595"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98595.mbox"},{"url":"https://git.kernel.org/stable/c/c21daf37d5ce9a4e234b7c42238ac1e6041e28e4"},{"url":"https://git.kernel.org/stable/c/d1b5fd969cc53f29d02b82b05a45135de4a6087a"},{"url":"https://git.kernel.org/stable/c/9e95b1a94c9c49b4ba722251bbca2759b9c51737"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00198,"epssPercentile":0.09465,"ingestedAt":"2026-10-18T15:45:12.247Z","slug":"CVE-2026-98595","body":"## Overview\n\nA flaw was found in the Linux kernel's UDP networking subsystem. When a connected User Datagram Protocol (UDP) socket bound to a specific address is disconnected, the kernel fails to remove the socket entry from its internal connection lookup table. A local user can cause stale entries to persist, potentially allowing incoming network packets from former peers to be improperly matched and delivered, or causing degraded network processing performance.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98595.json)\n\n**kernel: udp: remove a disconnected socket from the 4-tuple hash table** — rated Low by Red Hat. Released 2026-10-18, updated 2026-10-20.\n\nAffected:\n\n- Red Hat Enterprise Linux 6\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n\nNot affected:\n\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":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225716,"id":"CVE-2026-98595","ts":1792498383884,"field":"cvss","old":null,"new":"3.3"},{"seq":225715,"id":"CVE-2026-98595","ts":1792498383884,"field":"severity","old":"none","new":"low"}]}