{"id":"CVE-2026-89479","title":"kernel: sctp: stop processing a packet once its association is deleted (CVE-2026-89479)","summary":"A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. A remote attacker could send a specially crafted series of SCTP packets, leading to a use-after-free vulnerability. This occurs when the ker…","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 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4","enterprise_linux 6"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T08:52:57+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89479.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89479.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89479"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532290"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89479"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89479"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89479.mbox"},{"url":"https://git.kernel.org/stable/c/7d970353eeb98f46a3b9dc602850e4f6336a9889"},{"url":"https://git.kernel.org/stable/c/09c3b193a3e8fe53e1f416e2f8e3283d2a785405"},{"url":"https://git.kernel.org/stable/c/ed85fe91a61bc0e0da6b585c07102b20f4cc65a0"},{"url":"https://git.kernel.org/stable/c/5c0b2dbbdafc9eeeb11fffe1e46551fc3b55d8ee"},{"url":"https://git.kernel.org/stable/c/ee3f04cf566f6041aa9a0360494fd8db5ade383a"},{"url":"https://git.kernel.org/stable/c/fa306a40e716c5abcd967475459ce1ebd56e5115"},{"url":"https://git.kernel.org/stable/c/a713e1b3a265f180ad25a08e17be15d67a2f7149"},{"url":"https://git.kernel.org/stable/c/47e15a8d12e366d0d261bcbc394394f44418938d"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00506,"epssPercentile":0.42245,"scores":{"vendor":7,"cna":9.8},"ingestedAt":"2026-09-14T15:23:07.453Z","slug":"CVE-2026-89479","body":"## Overview\n\nA flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. A remote attacker could send a specially crafted series of SCTP packets, leading to a use-after-free vulnerability. This occurs when the kernel attempts to access memory that has already been deallocated, which could result in a denial of service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89479.json)\n\n**kernel: sctp: stop processing a packet once its association is deleted** — rated Important by Red Hat. Released 2026-09-11, updated 2026-09-18.\n\nAffected:\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- Red Hat Enterprise Linux 6\n\nNo fix planned:\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\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":206963,"id":"CVE-2026-89479","ts":1789749721968,"field":"cvss","old":"9.8","new":"7"},{"seq":206962,"id":"CVE-2026-89479","ts":1789749721968,"field":"severity","old":"critical","new":"high"},{"seq":198032,"id":"CVE-2026-89479","ts":1789384321473,"field":"cvss","old":"5.9","new":"9.8"},{"seq":198031,"id":"CVE-2026-89479","ts":1789384321473,"field":"severity","old":"medium","new":"critical"},{"seq":183790,"id":"CVE-2026-89479","ts":1789356677401,"field":"cvss","old":"9.8","new":"5.9"},{"seq":183789,"id":"CVE-2026-89479","ts":1789356677401,"field":"severity","old":"critical","new":"medium"},{"seq":153258,"id":"CVE-2026-89479","ts":1789285349772,"field":"cvss","old":null,"new":"9.8"},{"seq":153257,"id":"CVE-2026-89479","ts":1789285349772,"field":"severity","old":"none","new":"critical"},{"seq":147434,"id":"CVE-2026-89479","ts":1789270210894,"field":"cvss","old":null,"new":"5.9"},{"seq":147433,"id":"CVE-2026-89479","ts":1789270210894,"field":"severity","old":"none","new":"medium"},{"seq":109188,"id":"CVE-2026-89479","ts":1789183730655,"field":"cvss","old":null,"new":"5.9"},{"seq":109187,"id":"CVE-2026-89479","ts":1789183730655,"field":"severity","old":"none","new":"medium"}]}