{"id":"CVE-2026-89697","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89697","summary":"nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()\n\nThe BOTH_TIME_SET branch calls fh_verify() early so setattr_prepare()\ncan inspect the dentry. This causes nfsd_setattr() to skip\nfh_want_write(), so notify_change() runs without a mount write\nreference.\n\nAdd the missing fh_want_write() call after the early fh_verify().","published":"2026-09-11T19:46:15.772Z","modified":"2026-09-14T03:46:25.936829010Z","cvss":{"score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.12.109"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89697.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89697"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-14T03:46:25.936829010Z"}}