{"id":"CVE-2026-89714","title":"kernel: NFS: fix delegation_hash_table leak when nfs4_server_common_setup() fails (CVE-2026-89714)","summary":"A flaw was found in the Linux kernel's Network File System (NFS) component. When an NFSv4 mount attempt fails, the nfs4_server_common_setup() function does not properly free a memory allocation for the delegation hash table. A client that …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-772","vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-21","sourceUpdated":"2026-09-21T17:43:03+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89714.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89714.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89714"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532288"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89714"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89714"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89714.mbox"},{"url":"https://git.kernel.org/stable/c/0fd2b9687dae36be5b84eab39b4c627bb7ab33b3"},{"url":"https://git.kernel.org/stable/c/2092f5b38f88be306140c77aeeeb43fc1adacacc"},{"url":"https://git.kernel.org/stable/c/f3adf1643517357221422c05986d6de5df7b9913"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00198,"epssPercentile":0.09826,"ingestedAt":"2026-09-14T11:11:19.885Z","slug":"CVE-2026-89714","body":"## Overview\n\nA flaw was found in the Linux kernel's Network File System (NFS) component. When an NFSv4 mount attempt fails, the nfs4_server_common_setup() function does not properly free a memory allocation for the delegation hash table. A client that persistently retries a failed mount can exploit this to cause an unbounded kernel memory leak. This can lead to system instability and a Denial of Service (DoS) due to memory exhaustion.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89714.json)\n\n**kernel: NFS: fix delegation_hash_table leak when nfs4_server_common_setup() fails** — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-21.\n\nAffected:\n\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nAffected","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":208941,"id":"CVE-2026-89714","ts":1790062296730,"field":"cvss","old":"7.5","new":"5.5"},{"seq":208940,"id":"CVE-2026-89714","ts":1790062296730,"field":"severity","old":"high","new":"medium"},{"seq":204029,"id":"CVE-2026-89714","ts":1789490231115,"field":"cvss","old":null,"new":"7.5"},{"seq":204028,"id":"CVE-2026-89714","ts":1789490231115,"field":"severity","old":"none","new":"high"},{"seq":147414,"id":"CVE-2026-89714","ts":1789270210816,"field":"cvss","old":null,"new":"7.5"},{"seq":147413,"id":"CVE-2026-89714","ts":1789270210816,"field":"severity","old":"none","new":"high"},{"seq":109172,"id":"CVE-2026-89714","ts":1789183730593,"field":"cvss","old":null,"new":"7.5"},{"seq":109171,"id":"CVE-2026-89714","ts":1789183730593,"field":"severity","old":"none","new":"high"}]}