Detections
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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().
References
https://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175
https://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08
https://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc
https://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd