Linux Kernel up to 6.16.0 NFS nfs_fh_to_dentry memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 6.16.0. The impacted element is the function nfs_fh_to_dentry of the component NFS. The manipulation leads to memory corruption. This vulnerability is listed as CVE-2025-39730. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.16.0 and classified as critical. This issue affects the function nfs_fh_to_dentry of the component NFS. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix filehandle bounds checking in nfs_fh_to_dentry() The function needs to check the minimal filehandle length before it can access the embedded filehandle.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2025-39730 since 04/16/2025. The exploitation is known to be easy. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/09/2026).

The vulnerability scanner Nessus provides a plugin with the ID 266176 (Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2025-1208)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.297, 5.10.241, 5.15.190, 6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1 or 6.17-rc1 eliminates this vulnerability. Applying the patch 7f8eca87fef7519e9c41f3258f25ebc2752247ee/cb09afa0948d96b1e385d609ed044bb1aa043536/3570ef5c31314c13274c935a20b91768ab5bf412/763810bb883cb4de412a72f338d80947d97df67b/12ad3def2e5e0b120e3d0cb6ce8b7b796819ad40/2ad40b7992aa26bc631afc1a995b0e3ddc30de3f/b7f7866932466332a2528fda099000b035303485/7dd36f7477d1e03a1fcf8d13531ca326c4fb599f/ef93a685e01a281b5e2a25ce4e3428cf9371a205 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 (266176), EUVD (EUVD-2025-31500) and CERT Bund (WID-SEC-2025-1988). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • NetApp FAS
  • NetApp AFF
  • NetApp ActiveIQ Unified Manager
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Microsoft Azure
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM
  • IBM Security Verify Access
  • Dell NetWorker

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 266176
Nessus Name: Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2025-1208)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.297/5.10.241/5.15.190/6.1.148/6.6.102/6.12.42/6.15.10/6.16.1/6.17-rc1
Patch: 7f8eca87fef7519e9c41f3258f25ebc2752247ee/cb09afa0948d96b1e385d609ed044bb1aa043536/3570ef5c31314c13274c935a20b91768ab5bf412/763810bb883cb4de412a72f338d80947d97df67b/12ad3def2e5e0b120e3d0cb6ce8b7b796819ad40/2ad40b7992aa26bc631afc1a995b0e3ddc30de3f/b7f7866932466332a2528fda099000b035303485/7dd36f7477d1e03a1fcf8d13531ca326c4fb599f/ef93a685e01a281b5e2a25ce4e3428cf9371a205

Timelineinfo

04/16/2025 CVE reserved
09/07/2025 +144 days Advisory disclosed
09/07/2025 +0 days VulDB entry created
02/09/2026 +155 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-39730 (🔒)
GCVE (CVE): GCVE-0-2025-39730
GCVE (VulDB): GCVE-100-323033
EUVD: 🔒
CERT Bund: WID-SEC-2025-1988 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 09/07/2025 18:32
Updated: 02/09/2026 21:00
Changes: 09/07/2025 18:32 (59), 09/30/2025 23:03 (2), 11/27/2025 23:29 (7), 01/03/2026 15:02 (1), 01/12/2026 18:17 (11), 01/13/2026 22:02 (1), 01/25/2026 12:28 (1), 02/09/2026 21:00 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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