{"id":"CVE-2026-89668","title":"kernel: nfsd: move nfsd_debugfs_init() after nfsd4_init_slabs() in init_nfsd() (CVE-2026-89668)","summary":"A flaw was found in the `nfsd` component of the Linux kernel. The `nfsd_debugfs_init()` function is called before `nfsd4_init_slabs()`. If the slab allocation fails, the `nfsd_debugfs_exit()` cleanup function is bypassed, leaving orphaned …","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 10","affected":["enterprise_linux 10"],"published":"2026-09-11","updated":"2026-09-15","sourceUpdated":"2026-09-15T11:02:28+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89668.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89668.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89668"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532527"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89668"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89668"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89668.mbox"},{"url":"https://git.kernel.org/stable/c/2c390c8a1764d67095fe444401861fac4c049362"},{"url":"https://git.kernel.org/stable/c/4ae5d7490ae6a7b83b3d607f88c499f4f85e753a"},{"url":"https://git.kernel.org/stable/c/ab43ff94f5dfc2b6a080b167b69855eb7655c98b"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00171,"epssPercentile":0.06866,"scores":{"vendor":5.5,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.473Z","slug":"CVE-2026-89668","body":"## Overview\n\nA flaw was found in the `nfsd` component of the Linux kernel. The `nfsd_debugfs_init()` function is called before `nfsd4_init_slabs()`. If the slab allocation fails, the `nfsd_debugfs_exit()` cleanup function is bypassed, leaving orphaned debugfs files with stale function pointers. This can lead to a use-after-free vulnerability, potentially allowing a local attacker to cause a denial of service or escalate privileges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89668.json)\n\n**kernel: nfsd: move nfsd_debugfs_init() after nfsd4_init_slabs() in init_nfsd()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n\nNot affected:\n\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\n## Remediation\n\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":203908,"id":"CVE-2026-89668","ts":1789490220441,"field":"cvss","old":"5.5","new":"7"},{"seq":203907,"id":"CVE-2026-89668","ts":1789490220441,"field":"severity","old":"medium","new":"high"},{"seq":202993,"id":"CVE-2026-89668","ts":1789403733268,"field":"cvss","old":"7.8","new":"5.5"},{"seq":202992,"id":"CVE-2026-89668","ts":1789403733268,"field":"severity","old":"high","new":"medium"},{"seq":197768,"id":"CVE-2026-89668","ts":1789384318765,"field":"cvss","old":"5.5","new":"7.8"},{"seq":197767,"id":"CVE-2026-89668","ts":1789384318765,"field":"severity","old":"medium","new":"high"},{"seq":183698,"id":"CVE-2026-89668","ts":1789356677001,"field":"cvss","old":"7.8","new":"5.5"},{"seq":183697,"id":"CVE-2026-89668","ts":1789356677001,"field":"severity","old":"high","new":"medium"},{"seq":153530,"id":"CVE-2026-89668","ts":1789285351165,"field":"cvss","old":null,"new":"7.8"},{"seq":153529,"id":"CVE-2026-89668","ts":1789285351165,"field":"severity","old":"none","new":"high"},{"seq":147085,"id":"CVE-2026-89668","ts":1789270195104,"field":"cvss","old":null,"new":"5.5"},{"seq":147084,"id":"CVE-2026-89668","ts":1789270195104,"field":"severity","old":"none","new":"medium"},{"seq":108840,"id":"CVE-2026-89668","ts":1789183729200,"field":"cvss","old":null,"new":"5.5"},{"seq":108839,"id":"CVE-2026-89668","ts":1789183729200,"field":"severity","old":"none","new":"medium"}]}