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CVE-2026-89697 Details

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().

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: kernel.orgCVSS-B:9.1 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd	kernel.org
https://git.kernel.org/stable/c/2150305134889fb2fc25228d35353bd2f6f29500	kernel.org
https://git.kernel.org/stable/c/3eec9d791968c177a4a8cda9af5c04f79dae09cb	kernel.org
https://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc	kernel.org
https://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08	kernel.org
https://git.kernel.org/stable/c/9229d824b938f4fb0ea7a5dddade51735e6fe6f9	kernel.org
https://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175	kernel.org
https://git.kernel.org/stable/c/d823bf9285cdf4514873b85ab5a888878dd4e8f4	kernel.org

see all 8 references

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

Date	Action	Recorded By
Sep 14, 2026	CVE Modified	kernel.org
Sep 13, 2026	CVE Modified	kernel.org
Sep 11, 2026	New CVE Received	kernel.org