CVE-2026-89697

CVE-2026-89697

Critical · published September 12, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
52.5
In the wild
Unconfirmed
What it is

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().

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00696 · 52.5th percentile
Published
2026-09-12T00:19Z
References (8)
https://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2150305134889fb2fc25228d35353bd2f6f29500 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3eec9d791968c177a4a8cda9af5c04f79dae09cb · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9229d824b938f4fb0ea7a5dddade51735e6fe6f9 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d823bf9285cdf4514873b85ab5a888878dd4e8f4 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 13 SEP 03:23Z
    EPSS moved — → 0%
    epss
  • 11 SEP 19:46Z
    nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()
    cvelistv5