{"id":"CVE-2026-89534","title":"kernel: svcrdma: Clear sc_cm_id when ADDR_CHANGE replacement fails (CVE-2026-89534)","summary":"A flaw was found in the Linux kernel's `svcrdma` module. This vulnerability occurs when the system attempts to handle an RDMA (Remote Direct Memory Access) address change, and a critical memory allocation fails. This can lead to a 'use-aft…","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 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T09:58:39+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89534.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89534.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89534"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532026"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89534"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89534"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89534.mbox"},{"url":"https://git.kernel.org/stable/c/673e358ab7c11f8cec223c6a36a793056a67facd"},{"url":"https://git.kernel.org/stable/c/01500306e1d50de7ca7a2cdcdfa28ac0523eb747"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00218,"epssPercentile":0.12537,"scores":{"vendor":7,"cna":8.8},"ingestedAt":"2026-09-14T15:23:07.475Z","slug":"CVE-2026-89534","body":"## Overview\n\nA flaw was found in the Linux kernel's `svcrdma` module. This vulnerability occurs when the system attempts to handle an RDMA (Remote Direct Memory Access) address change, and a critical memory allocation fails. This can lead to a 'use-after-free' error, where the system tries to access memory that has already been released. A local attacker could potentially exploit this to cause a system crash, leading to a denial of service, or in some scenarios, execute unauthorized code.\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 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89534.json)\n\n**kernel: svcrdma: Clear sc_cm_id when ADDR_CHANGE replacement fails** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.\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":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":202796,"id":"CVE-2026-89534","ts":1789403722683,"field":"cvss","old":"8.8","new":"7"},{"seq":197959,"id":"CVE-2026-89534","ts":1789384321148,"field":"cvss","old":"5.9","new":"8.8"},{"seq":197958,"id":"CVE-2026-89534","ts":1789384321148,"field":"severity","old":"medium","new":"high"},{"seq":183760,"id":"CVE-2026-89534","ts":1789356677272,"field":"cvss","old":"8.8","new":"5.9"},{"seq":183759,"id":"CVE-2026-89534","ts":1789356677272,"field":"severity","old":"high","new":"medium"},{"seq":153328,"id":"CVE-2026-89534","ts":1789285350065,"field":"cvss","old":null,"new":"8.8"},{"seq":153327,"id":"CVE-2026-89534","ts":1789285350065,"field":"severity","old":"none","new":"high"},{"seq":109648,"id":"CVE-2026-89534","ts":1789183732782,"field":"cvss","old":null,"new":"5.9"},{"seq":109647,"id":"CVE-2026-89534","ts":1789183732782,"field":"severity","old":"none","new":"medium"}]}