CVE-2026-89697Critical· 9.1▾ MidnightIn 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 dentr…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 50.1 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 6.8
none → medium
— → 9.1
none → critical
9.1 → 6.8
critical → medium
6.8 → 9.1
medium → critical
9.1 → 7
critical → high
0.2% → 0.7%
7 → 9.1
high → critical
Last analysed / modified upstream
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().
Linux >= cc265089ce1b176dde963c74b53593446ee7f99a < 3eec9d791968c177a4a8cda9af5c04f79dae09cbLinux >= cc265089ce1b176dde963c74b53593446ee7f99a < 9229d824b938f4fb0ea7a5dddade51735e6fe6f9Linux >= cc265089ce1b176dde963c74b53593446ee7f99a < 2150305134889fb2fc25228d35353bd2f6f29500Linux >= cc265089ce1b176dde963c74b53593446ee7f99a < d823bf9285cdf4514873b85ab5a888878dd4e8f4Linux >= cc265089ce1b176dde963c74b53593446ee7f99a < 15ca3b64a69caa6194bed8f98a20ed90a11c11ddLinux >= cc265089ce1b176dde963c74b53593446ee7f99a < 533964d420d385e11b08dd4c56c66ef5dcccaf08Linux >= cc265089ce1b176dde963c74b53593446ee7f99a < c4a409b86a92815181a8e9395c6bf1696ad19175Linux >= cc265089ce1b176dde963c74b53593446ee7f99a < 4e475be769aa9f7a2c1ce55a2b8592cfccacddccLinux 1cb57d81cf20fe24b9e2e1daf57bfbdc24b77cd8Linux >= 3.18.46 < 3.19Linux 4.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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