NFS: Fix a race when updating an existing write

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-39697
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-05 18:15:46 UTC
Updated2026-05-12 13:17:06 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: NFS: Fix a race when updating an existing write After nfs_lock_and_join_requests() tests for whether the request is still attached to the mapping, nothing prevents a call to nfs_inode_remove_request() from succeeding until we actually lock the page group. The reason is that whoever called nfs_inode_remove_request() doesn't necessarily have a lock on the page group head. So in order to avoid races, let's take the page group lock earlier in nfs_lock_and_join_requests(), and hold it across the removal of the request in nfs_inode_remove_request().

Risk And Classification

Primary CVSS: v3.1 4.7 MEDIUM from [email protected]

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

Problem Types: CWE-362

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bd37d6fce184836bd5e7cd90ce40116a4fadaf2a 0ff42a32784e0f2cb46a46da8e9f473538c13e1b git Not specified
CNA Linux Linux affected bd37d6fce184836bd5e7cd90ce40116a4fadaf2a f230d40147cc37eb3aef4d50e2e2c06ea73d9a77 git Not specified
CNA Linux Linux affected bd37d6fce184836bd5e7cd90ce40116a4fadaf2a c32e3c71aaa1c1ba05da88605e2ddd493c58794f git Not specified
CNA Linux Linux affected bd37d6fce184836bd5e7cd90ce40116a4fadaf2a 181feb41f0b268e6288bf9a7b984624d7fe2031d git Not specified
CNA Linux Linux affected bd37d6fce184836bd5e7cd90ce40116a4fadaf2a 92278ae36935a54e65fef9f8ea8efe7e80481ace git Not specified
CNA Linux Linux affected bd37d6fce184836bd5e7cd90ce40116a4fadaf2a 202a3432d21ac060629a760fff3b0a39859da3ea git Not specified
CNA Linux Linux affected bd37d6fce184836bd5e7cd90ce40116a4fadaf2a 76d2e3890fb169168c73f2e4f8375c7cc24a765e git Not specified
CNA Linux Linux affected 4.14 Not specified
CNA Linux Linux unaffected 4.14 semver Not specified
CNA Linux Linux unaffected 5.10.242 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.191 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.150 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.104 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.44 6.12.* semver Not specified
CNA Linux Linux unaffected 6.16.4 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified
ADP Siemens SIMATIC CN 4100 affected V5.0 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/92278ae36935a54e65fef9f8ea8efe7e80481ace 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-082556.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/c32e3c71aaa1c1ba05da88605e2ddd493c58794f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/181feb41f0b268e6288bf9a7b984624d7fe2031d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/76d2e3890fb169168c73f2e4f8375c7cc24a765e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/202a3432d21ac060629a760fff3b0a39859da3ea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-032379.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/f230d40147cc37eb3aef4d50e2e2c06ea73d9a77 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/0ff42a32784e0f2cb46a46da8e9f473538c13e1b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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