In 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().

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/0ff42a32784e0f2cb46a46da8e9f473538c13e1b cve-icon cve-icon
https://git.kernel.org/stable/c/181feb41f0b268e6288bf9a7b984624d7fe2031d cve-icon cve-icon
https://git.kernel.org/stable/c/202a3432d21ac060629a760fff3b0a39859da3ea cve-icon cve-icon
https://git.kernel.org/stable/c/76d2e3890fb169168c73f2e4f8375c7cc24a765e cve-icon cve-icon
https://git.kernel.org/stable/c/92278ae36935a54e65fef9f8ea8efe7e80481ace cve-icon cve-icon
https://git.kernel.org/stable/c/c32e3c71aaa1c1ba05da88605e2ddd493c58794f cve-icon cve-icon
https://git.kernel.org/stable/c/f230d40147cc37eb3aef4d50e2e2c06ea73d9a77 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025090548-CVE-2025-39697-5284@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-39697 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-39697 cve-icon
History

Mon, 08 Sep 2025 06:30:00 +0000

Type Values Removed Values Added
References

Sat, 06 Sep 2025 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Sat, 06 Sep 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Fri, 05 Sep 2025 17:30:00 +0000

Type Values Removed Values Added
Description In 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().
Title NFS: Fix a race when updating an existing write
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-09-05T17:21:03.178Z

Updated: 2025-09-08T06:22:02.034Z

Reserved: 2025-04-16T07:20:57.115Z

Link: CVE-2025-39697

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-09-05T18:15:46.623

Modified: 2025-09-08T16:25:38.810

Link: CVE-2025-39697

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-09-05T00:00:00Z

Links: CVE-2025-39697 - Bugzilla