{"id":"CVE-2026-89531","title":"kernel: svcrdma: Reject connection when transport allocation fails (CVE-2026-89531)","summary":"A flaw was found in the Linux kernel's svcrdma module. A remote attacker can exploit this vulnerability by repeatedly attempting connections when the system is under memory pressure. This can lead to a resource leak of `rdma_cm_id` objects…","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-772","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":"2026-09-18","sourceUpdated":"2026-09-18T21:55:51+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89531.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89531.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89531"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532393"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89531"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89531"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89531.mbox"},{"url":"https://git.kernel.org/stable/c/0944462247dcb7de7622cdaaadf5f05c52707dab"},{"url":"https://git.kernel.org/stable/c/1f6a14c142fee4778c32709d1d54595c2e2b7991"},{"url":"https://git.kernel.org/stable/c/3cf372cec7ab2cd8c6002bf775cc14d90ccb098b"},{"url":"https://git.kernel.org/stable/c/6e21754bbf75075f3fee1cebc79f3417364235ec"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00209,"epssPercentile":0.09828,"ingestedAt":"2026-09-14T11:11:19.886Z","slug":"CVE-2026-89531","body":"## Overview\n\nA flaw was found in the Linux kernel's svcrdma module. A remote attacker can exploit this vulnerability by repeatedly attempting connections when the system is under memory pressure. This can lead to a resource leak of `rdma_cm_id` objects, which, if amplified, could result in a Denial of Service (DoS) due to resource exhaustion.\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 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89531.json)\n\n**kernel: svcrdma: Reject connection when transport allocation fails** — rated Moderate 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 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,"exploitation":0,"ransomware":0},"changes":[{"seq":206921,"id":"CVE-2026-89531","ts":1789749702895,"field":"cvss","old":"5.9","new":"7"},{"seq":206920,"id":"CVE-2026-89531","ts":1789749702895,"field":"severity","old":"medium","new":"high"},{"seq":203968,"id":"CVE-2026-89531","ts":1789490230844,"field":"cvss","old":null,"new":"5.9"},{"seq":203967,"id":"CVE-2026-89531","ts":1789490230844,"field":"severity","old":"none","new":"medium"},{"seq":147283,"id":"CVE-2026-89531","ts":1789270206857,"field":"cvss","old":null,"new":"5.9"},{"seq":147282,"id":"CVE-2026-89531","ts":1789270206857,"field":"severity","old":"none","new":"medium"},{"seq":109028,"id":"CVE-2026-89531","ts":1789183730021,"field":"cvss","old":null,"new":"5.9"},{"seq":109027,"id":"CVE-2026-89531","ts":1789183730021,"field":"severity","old":"none","new":"medium"}]}