{"id":"CVE-2026-89478","title":"kernel: sctp: drop a chunk if its transport was removed (CVE-2026-89478)","summary":"A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. An authenticated attacker could exploit a timing window during the removal of an SCTP transport. This could lead to the system attempting to…","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":"2026-09-15","sourceUpdated":"2026-09-15T12:24:08+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89478.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89478.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89478"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532439"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89478"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89478"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89478.mbox"},{"url":"https://git.kernel.org/stable/c/3fc072e7cb4a0ff251d13cfc2d24f62489cd9386"},{"url":"https://git.kernel.org/stable/c/d7cb5ad832095dc4becfdb2a36007ffd50e49fb0"},{"url":"https://git.kernel.org/stable/c/0422b092a3d43ca462932ff9f747731ca078d1d4"},{"url":"https://git.kernel.org/stable/c/928fd7920ba37cc5637a211b9be979083413a2fa"},{"url":"https://git.kernel.org/stable/c/c6c86a5e62a4fec36692ddd64b9144b660f71f96"},{"url":"https://git.kernel.org/stable/c/1035bdef1efb9b1076d1a57b81e08c637ff08ecc"},{"url":"https://git.kernel.org/stable/c/3537961df2163258bddc230db0e18dc14e925ea6"},{"url":"https://git.kernel.org/stable/c/03a9d10ecf71f54b2af8020935f2033d4a132be5"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00521,"epssPercentile":0.43212,"scores":{"vendor":7,"cna":9.8},"ingestedAt":"2026-09-14T15:23:07.453Z","slug":"CVE-2026-89478","body":"## Overview\n\nA flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. An authenticated attacker could exploit a timing window during the removal of an SCTP transport. This could lead to the system attempting to read from freed memory, potentially causing a denial of service or information disclosure.\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 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89478.json)\n\n**kernel: sctp: drop a chunk if its transport was removed** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.\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":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":203893,"id":"CVE-2026-89478","ts":1789490212683,"field":"cvss","old":"9.8","new":"7"},{"seq":203892,"id":"CVE-2026-89478","ts":1789490212683,"field":"severity","old":"critical","new":"high"},{"seq":198030,"id":"CVE-2026-89478","ts":1789384321464,"field":"cvss","old":"5.9","new":"9.8"},{"seq":198029,"id":"CVE-2026-89478","ts":1789384321464,"field":"severity","old":"medium","new":"critical"},{"seq":183794,"id":"CVE-2026-89478","ts":1789356677417,"field":"cvss","old":"9.8","new":"5.9"},{"seq":183793,"id":"CVE-2026-89478","ts":1789356677417,"field":"severity","old":"critical","new":"medium"},{"seq":153256,"id":"CVE-2026-89478","ts":1789285349764,"field":"cvss","old":null,"new":"9.8"},{"seq":153255,"id":"CVE-2026-89478","ts":1789285349764,"field":"severity","old":"none","new":"critical"},{"seq":147247,"id":"CVE-2026-89478","ts":1789270204202,"field":"cvss","old":null,"new":"5.9"},{"seq":147246,"id":"CVE-2026-89478","ts":1789270204202,"field":"severity","old":"none","new":"medium"},{"seq":109010,"id":"CVE-2026-89478","ts":1789183729939,"field":"cvss","old":null,"new":"5.9"},{"seq":109009,"id":"CVE-2026-89478","ts":1789183729939,"field":"severity","old":"none","new":"medium"}]}