CVE-2026-89697
Critical
Description
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().
SeverityCritical
CVSS9.1
Exploit probability—
Product
Linux
PublishedSep 11, 2026
First seenSep 11, 2026
How to fix
Update
- Linux Linux3eec9d791968c177a4a8cda9af5c04f79dae09cb, 9229d824b938f4fb0ea7a5dddade51735e6fe6f9, 2150305134889fb2fc25228d35353bd2f6f29500, d823bf9285cdf4514873b85ab5a888878dd4e8f4, 15ca3b64a69caa6194bed8f98a20ed90a11c11dd, 533964d420d385e11b08dd4c56c66ef5dcccaf08, c4a409b86a92815181a8e9395c6bf1696ad19175, 4e475be769aa9f7a2c1ce55a2b8592cfccacddcc, 3.19 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | cc265089ce1b176dde963c74b53593446ee7f99a ≤ v < 3eec9d791968c177a4a8cda9af5c04f79dae09cb, cc265089ce1b176dde963c74b53593446ee7f99a ≤ v < 9229d824b938f4fb0ea7a5dddade51735e6fe6f9, cc265089ce1b176dde963c74b53593446ee7f99a ≤ v < 2150305134889fb2fc25228d35353bd2f6f29500, cc265089ce1b176dde963c74b53593446ee7f99a ≤ v < d823bf9285cdf4514873b85ab5a888878dd4e8f4, cc265089ce1b176dde963c74b53593446ee7f99a ≤ v < 15ca3b64a69caa6194bed8f98a20ed90a11c11dd, cc265089ce1b176dde963c74b53593446ee7f99a ≤ v < 533964d420d385e11b08dd4c56c66ef5dcccaf08, cc265089ce1b176dde963c74b53593446ee7f99a ≤ v < c4a409b86a92815181a8e9395c6bf1696ad19175, cc265089ce1b176dde963c74b53593446ee7f99a ≤ v < 4e475be769aa9f7a2c1ce55a2b8592cfccacddcc, 1cb57d81cf20fe24b9e2e1daf57bfbdc24b77cd8, 3.18.46 ≤ v < 3.19, 4.2 | 3eec9d791968c177a4a8cda9af5c04f79dae09cb, 9229d824b938f4fb0ea7a5dddade51735e6fe6f9, 2150305134889fb2fc25228d35353bd2f6f29500, d823bf9285cdf4514873b85ab5a888878dd4e8f4, 15ca3b64a69caa6194bed8f98a20ed90a11c11dd, 533964d420d385e11b08dd4c56c66ef5dcccaf08, c4a409b86a92815181a8e9395c6bf1696ad19175, 4e475be769aa9f7a2c1ce55a2b8592cfccacddcc, 3.19 |
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