{"id":"CVE-2026-89665","title":"kernel: nfsd: reject out-of-range useconds in NFSv2 SETATTR/CREATE (CVE-2026-89665)","summary":"A flaw was found in the Linux kernel's nfsd component. A remote attacker could exploit this vulnerability by sending a specially crafted NFSv2 SETATTR or CREATE request with an out-of-range 'useconds' value. This could lead to incorrect ti…","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-190","vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","affected":["enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-15","sourceUpdated":"2026-09-15T05:37:00+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89665.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89665.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89665"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532498"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89665"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89665"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89665.mbox"},{"url":"https://git.kernel.org/stable/c/cdc3299f7072777b09c9582a3b8b65bb163ddcf3"},{"url":"https://git.kernel.org/stable/c/09a79d9ab35a39603c834e8f6333603292f9c816"},{"url":"https://git.kernel.org/stable/c/5296a2442d12d45d6eea7b4d3ec3ffecc1821cac"},{"url":"https://git.kernel.org/stable/c/1db456ffc22e045f49f7b9e62415a26b3f33f200"},{"url":"https://git.kernel.org/stable/c/a937dd1aa2d92291fe0a1860d17e90d8f206cd22"},{"url":"https://git.kernel.org/stable/c/ad02d095439f89cbd6629420c7e3ba476457b83b"},{"url":"https://git.kernel.org/stable/c/1195483965a5f63d2dde18054ec7e50a23b9071c"},{"url":"https://git.kernel.org/stable/c/26709c8ffe73772eb69e68d553ac71d91228dccc"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.0062,"epssPercentile":0.48047,"scores":{"vendor":7,"cna":8.2},"ingestedAt":"2026-09-14T15:23:07.450Z","slug":"CVE-2026-89665","body":"## Overview\n\nA flaw was found in the Linux kernel's nfsd component. A remote attacker could exploit this vulnerability by sending a specially crafted NFSv2 SETATTR or CREATE request with an out-of-range 'useconds' value. This could lead to incorrect timestamps being written to the filesystem, resulting in data corruption. Additionally, such malformed requests may cause a Denial of Service (DoS) by triggering an RPC GARBAGE_ARGS reply.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89665.json)\n\n**kernel: nfsd: reject out-of-range useconds in NFSv2 SETATTR/CREATE** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.\n\nAffected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\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":203966,"id":"CVE-2026-89665","ts":1789490230835,"field":"cvss","old":"8.2","new":"7"},{"seq":197775,"id":"CVE-2026-89665","ts":1789384318796,"field":"cvss","old":"6.8","new":"8.2"},{"seq":197774,"id":"CVE-2026-89665","ts":1789384318796,"field":"severity","old":"medium","new":"high"},{"seq":183696,"id":"CVE-2026-89665","ts":1789356676993,"field":"cvss","old":"8.2","new":"6.8"},{"seq":183695,"id":"CVE-2026-89665","ts":1789356676993,"field":"severity","old":"high","new":"medium"},{"seq":153526,"id":"CVE-2026-89665","ts":1789285351150,"field":"cvss","old":null,"new":"8.2"},{"seq":153525,"id":"CVE-2026-89665","ts":1789285351150,"field":"severity","old":"none","new":"high"},{"seq":147163,"id":"CVE-2026-89665","ts":1789270198036,"field":"cvss","old":null,"new":"6.8"},{"seq":147162,"id":"CVE-2026-89665","ts":1789270198036,"field":"severity","old":"none","new":"medium"},{"seq":108912,"id":"CVE-2026-89665","ts":1789183729512,"field":"cvss","old":null,"new":"6.8"},{"seq":108911,"id":"CVE-2026-89665","ts":1789183729512,"field":"severity","old":"none","new":"medium"}]}