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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89697
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:56 UTC
Updated2026-10-16 20:18:26 UTC
DescriptionIn 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().

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS: 0.006030000 probability, percentile 0.470090000 (date 2026-09-14)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
3.1CNADECLARED9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cc265089ce1b176dde963c74b53593446ee7f99a 3eec9d791968c177a4a8cda9af5c04f79dae09cb git Not specified
CNA Linux Linux affected cc265089ce1b176dde963c74b53593446ee7f99a 9229d824b938f4fb0ea7a5dddade51735e6fe6f9 git Not specified
CNA Linux Linux affected cc265089ce1b176dde963c74b53593446ee7f99a 2150305134889fb2fc25228d35353bd2f6f29500 git Not specified
CNA Linux Linux affected cc265089ce1b176dde963c74b53593446ee7f99a d823bf9285cdf4514873b85ab5a888878dd4e8f4 git Not specified
CNA Linux Linux affected cc265089ce1b176dde963c74b53593446ee7f99a 15ca3b64a69caa6194bed8f98a20ed90a11c11dd git Not specified
CNA Linux Linux affected cc265089ce1b176dde963c74b53593446ee7f99a 533964d420d385e11b08dd4c56c66ef5dcccaf08 git Not specified
CNA Linux Linux affected cc265089ce1b176dde963c74b53593446ee7f99a c4a409b86a92815181a8e9395c6bf1696ad19175 git Not specified
CNA Linux Linux affected cc265089ce1b176dde963c74b53593446ee7f99a 4e475be769aa9f7a2c1ce55a2b8592cfccacddcc git Not specified
CNA Linux Linux affected 1cb57d81cf20fe24b9e2e1daf57bfbdc24b77cd8 git Not specified
CNA Linux Linux affected 3.18.46 3.19 semver Not specified
CNA Linux Linux affected 4.2 Not specified
CNA Linux Linux unaffected 4.2 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3eec9d791968c177a4a8cda9af5c04f79dae09cb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d823bf9285cdf4514873b85ab5a888878dd4e8f4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9229d824b938f4fb0ea7a5dddade51735e6fe6f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2150305134889fb2fc25228d35353bd2f6f29500 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report