Linux Kernel up to 6.15.9/6.16.0/6.17-rc1 nfsd_open_local_fh expired file descriptor

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.15.9/6.16.0/6.17-rc1. This vulnerability affects the function nfsd_open_local_fh. Such manipulation leads to expired file descriptor. This vulnerability is uniquely identified as CVE-2025-38567. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.15.9/6.16.0/6.17-rc1. It has been rated as critical. Affected by this issue is the function nfsd_open_local_fh. The manipulation with an unknown input leads to a expired file descriptor vulnerability. Using CWE to declare the problem leads to CWE-910. The product uses or accesses a file descriptor after it has been closed. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: nfsd: avoid ref leak in nfsd_open_local_fh() If two calls to nfsd_open_local_fh() race and both successfully call nfsd_file_acquire_local(), they will both get an extra reference to the net to accompany the file reference stored in *pnf. One of them will fail to store (using xchg()) the file reference in *pnf and will drop that reference but WON'T drop the accompanying reference to the net. This leak means that when the nfs server is shut down it will hang in nfsd_shutdown_net() waiting for &nn->nfsd_net_free_done. This patch adds the missing nfsd_net_put().

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2025-38567 since 04/16/2025. The exploitation is known to be difficult. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 260158 (Linux Distros Unpatched Vulnerability : CVE-2025-38567), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.15.10, 6.16.1 or 6.17-rc2 eliminates this vulnerability. Applying the patch fcb0a417fddb605530c4837e0996620f8ed38023/c4bf8f26c51e51bbb840935659a7b3b65a802c07/e5a73150776f18547ee685c9f6bfafe549714899 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (260158) and CERT Bund (WID-SEC-2025-1869). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Dell Avamar
  • Open Source Linux Kernel
  • Dell NetWorker
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Expired file descriptor
CWE: CWE-910
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 260158
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-38567

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.15.10/6.16.1/6.17-rc2
Patch: fcb0a417fddb605530c4837e0996620f8ed38023/c4bf8f26c51e51bbb840935659a7b3b65a802c07/e5a73150776f18547ee685c9f6bfafe549714899

Timelineinfo

04/16/2025 CVE reserved
08/19/2025 +125 days Advisory disclosed
08/19/2025 +0 days VulDB entry created
12/15/2025 +118 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-38567 (🔒)
GCVE (CVE): GCVE-0-2025-38567
GCVE (VulDB): GCVE-100-320642
CERT Bund: WID-SEC-2025-1869 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 08/19/2025 19:35
Updated: 12/15/2025 22:29
Changes: 08/19/2025 19:35 (58), 09/02/2025 09:02 (2), 09/22/2025 06:31 (7), 09/23/2025 04:50 (1), 09/24/2025 15:44 (1), 10/27/2025 00:25 (1), 11/01/2025 11:50 (1), 11/26/2025 21:33 (10), 12/15/2025 22:29 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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