CriticalFix available
nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr() The BOTH_TIME_SET branch calls fh_verify() early so setattr_prepare() can inspect the dentry. This causes nfsd_setattr() to skip fh_want_write(), so notify_change() runs without a mount write reference. Add the missing fh_want_write() call after the early fh_verify().
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.270, 5.15.221, 6.1.188, 6.12.109, 6.18.50, 6.6.157, 7.2.4
- CVEs
- CVE-2026-89697
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 18:47 UTC · Revision 1
Source evidence
nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()
core-osv · Original sourcePublished 11 Sept 2026, 19:46 UTC
In the Linux kernel, the following vulnerability has been resolved: nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr() The BOTH_TIME_SET branch calls fh_verify() early so setattr_prepare() can inspect the dentry. This causes nfsd_setattr() to skip fh_want_write(), so notify_change() runs without a mount write reference. Add the missing fh_want_write() call after the early fh_verify().
osv:CVE-2026-89697
Kernel
Fixed versions: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4
Complete source record
{
"id": "08def4a16cd29633ce1d2ae0d2553c80468891e5c1055348835671fd81415ff3",
"url": "https://osv.dev/vulnerability/CVE-2026-89697",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr() The BOTH_TIME_SET branch calls fh_verify() early so setattr_prepare() can inspect the dentry. This causes nfsd_setattr() to skip fh_want_write(), so notify_change() runs without a mount write reference. Add the missing fh_want_write() call after the early fh_verify().",
"evidence": "osv:CVE-2026-89697",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.10.270",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.221",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.188",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.157",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.109",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.50",
"evidence": "/affected/1/ranges"
},
{
"value": "7.2.4",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "CVE-2026-89697",
"aliases": [
"CVE-2026-89697"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "cc265089ce1b176dde963c74b53593446ee7f99a"
},
{
"fixed": "3eec9d791968c177a4a8cda9af5c04f79dae09cb"
},
{
"fixed": "9229d824b938f4fb0ea7a5dddade51735e6fe6f9"
},
{
"fixed": "2150305134889fb2fc25228d35353bd2f6f29500"
},
{
"fixed": "d823bf9285cdf4514873b85ab5a888878dd4e8f4"
},
{
"fixed": "15ca3b64a69caa6194bed8f98a20ed90a11c11dd"
},
{
"fixed": "533964d420d385e11b08dd4c56c66ef5dcccaf08"
},
{
"fixed": "c4a409b86a92815181a8e9395c6bf1696ad19175"
},
{
"fixed": "4e475be769aa9f7a2c1ce55a2b8592cfccacddcc"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "3.18.46"
},
{
"fixed": "3.19"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "1cb57d81cf20fe24b9e2e1daf57bfbdc24b77cd8"
}
]
}
],
"versions": [
"v3.18.140",
"v3.18.139",
"v3.18.138",
"v3.18.137",
"v3.18.136",
"v3.18.135",
"v3.18.134",
"v3.18.133",
"v3.18.132",
"v3.18.131",
"v3.18.130",
"v3.18.129",
"v3.18.128",
"v3.18.127",
"v3.18.126",
"v3.18.125",
"v3.18.124",
"v3.18.123",
"v3.18.122",
"v3.18.121",
"v3.18.120",
"v3.18.119",
"v3.18.118",
"v3.18.117",
"v3.18.116",
"v3.18.115",
"v3.18.114",
"v3.18.113",
"v3.18.112",
"v3.18.111",
"v3.18.110",
"v3.18.109",
"v3.18.108",
"v3.18.107",
"v3.18.106",
"v3.18.105",
"v3.18.104",
"v3.18.103",
"v3.18.102",
"v3.18.101",
"v3.18.100",
"v3.18.99",
"v3.18.98",
"v3.18.97",
"v3.18.96",
"v3.18.95",
"v3.18.94",
"v3.18.93",
"v3.18.92",
"v3.18.91",
"v3.18.90",
"v3.18.89",
"v3.18.88",
"v3.18.87",
"v3.18.86",
"v3.18.85",
"v3.18.84",
"v3.18.83",
"v3.18.82",
"v3.18.81",
"v3.18.80",
"v3.18.79",
"v3.18.78",
"v3.18.77",
"v3.18.76",
"v3.18.75",
"v3.18.74",
"v3.18.73",
"v3.18.72",
"v3.18.71",
"v3.18.70",
"v3.18.69",
"v3.18.68",
"v3.18.67",
"v3.18.66",
"v3.18.65",
"v3.18.64",
"v3.18.63",
"v3.18.62",
"v3.18.61",
"v3.18.60",
"v3.18.59",
"v3.18.58",
"v3.18.57",
"v3.18.56",
"v3.18.55",
"v3.18.54",
"v3.18.53",
"v3.18.52",
"v3.18.51",
"v3.18.50",
"v3.18.49",
"v3.18.48",
"v3.18.47",
"v3.18.46"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89697.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.2.0"
},
{
"fixed": "5.10.270"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.11.0"
},
{
"fixed": "5.15.221"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.16.0"
},
{
"fixed": "6.1.188"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
},
{
"fixed": "6.6.157"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
},
{
"fixed": "6.12.109"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
},
{
"fixed": "6.18.50"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.2.4"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89697.json"
}
}
],
"modified": "2026-10-28T02:30:38.336580966Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd",
"https://git.kernel.org/stable/c/2150305134889fb2fc25228d35353bd2f6f29500",
"https://git.kernel.org/stable/c/3eec9d791968c177a4a8cda9af5c04f79dae09cb",
"https://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc",
"https://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08",
"https://git.kernel.org/stable/c/9229d824b938f4fb0ea7a5dddade51735e6fe6f9",
"https://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175",
"https://git.kernel.org/stable/c/d823bf9285cdf4514873b85ab5a888878dd4e8f4",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89697.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-89697",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89697.json"
}
},
"related_cves": [
{
"value": "CVE-2026-89697",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 505842,
"published_at": "2026-09-11T19:46:15.772+00:00"
}