CVE intelligence

CVE-2025-39730

Vulnerability intelligence

Published Sep 7, 2025Sources checked Nov 3, 2026

7.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2025-39730 and is rated High severity with a CVSS score of 7.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Ubuntu Security Notices guidance

Vendor revision: Nov 3, 2026

Vendor remediation details

This update corrects flaws in the following subsystems: - Ethernet bonding driver; - Network drivers; - SCSI subsystem; - F2FS file system; - Network file system (NFS) client; - Tracing infrastructure; - io_uring subsystem; - Networking core; - IUCV driver; - RxRPC session sockets; (CVE-2022-49082, CVE-2022-49149, CVE-2022-49170, CVE-2022-49182, CVE-2022-49201, CVE-2024-53187, CVE-2024-53210, CVE-2024-56763, CVE-2025-39730, CVE-2026-43456, CVE-2026-52910)

Ubuntu Security Notices guidance

Vendor revision: Nov 3, 2026

This update corrects flaws in the following subsystems: - SCSI subsystem; - Network file system (NFS) client; (CVE-2022-49082, CVE-2025-39730)

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2025-39730?

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.

Source: NVD