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CVE

CVE-2026-89697

nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()
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CVE

CVE-2026-89697

nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()

In the Linux kernel, the following vulnerability has been resolved:

nfsd: add fhwantwrite() for early-verified SETATTR in nfsdprocsetattr()

The BOTHTIMESET branch calls fhverify() early so setattrprepare()

can inspect the dentry. This causes nfsd_setattr() to skip

fhwantwrite(), so notify_change() runs without a mount write

reference.

Add the missing fhwantwrite() call after the early fh_verify().

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd, https://git.kernel.org/stable/c/2150305134889fb2fc25228d35353bd2f6f29500, https://git.kernel.org/stable/c/3eec9d791968c177a4a8cda9af5c04f79dae09cb, https://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc, https://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08, https://git.kernel.org/stable/c/9229d824b938f4fb0ea7a5dddade51735e6fe6f9, https://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175, https://git.kernel.org/stable/c/d823bf9285cdf4514873b85ab5a888878dd4e8f4, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89697.json, https://nvd.nist.gov/vuln/detail/CVE-2026-89697, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.1

CVSS Score
0
10

Basic Information

Base CVSS
9.1
EPSS Probability
0.00696%
EPSS Percentile
0.51537%
Introduced Version
cc265089ce1b176dde963c74b53593446ee7f99a,3.18.46,1cb57d81cf20fe24b9e2e1daf57bfbdc24b77cd8,4.2.0,5.11.0,5.16.0,6.2.0,6.7.0,6.13.0,6.19.0,0
Fix Available
4e475be769aa9f7a2c1ce55a2b8592cfccacddcc,3.19,5.10.270,5.15.221,6.1.188,6.6.157,6.12.109,6.18.50,7.2.4,6.12.111-1~deb12u1,6.12.111-1

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