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CVE-2025-39743

Vulnerability intelligence

Published Sep 11, 2025Sources checked Nov 10, 2026
7.8HIGHCVSS out of 10
What this means

Review the available evidence

CVE-2025-39743 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 10, 2026
Vendor remediation details

This update corrects flaws in the following subsystems: - GPU drivers; - IIO ADC drivers; - Multiple devices driver; - Ethernet bonding driver; - Network drivers; - PCI subsystem; - VFIO drivers; - File systems infrastructure; - F2FS file system; - JFS file system; - Network file system (NFS) server daemon; - OCFS2 file system; - Overlay file system; - Tracing infrastructure; - IUCV driver; (CVE-2021-47633, CVE-2022-49058, CVE-2022-49170, CVE-2023-52784, CVE-2024-53194, CVE-2024-53210, CVE-2024-53214, CVE-2024-56570, CVE-2024-56616, CVE-2024-56763, CVE-2024-56779, CVE-2024-57904, CVE-2025-21664, CVE-2025-38604, CVE-2025-39743, CVE-2026-43456, CVE-2026-74350)

Ubuntu Security Notices guidance

Vendor revision: Nov 10, 2026
Vendor remediation details

This update corrects flaws in the following subsystems: - GPU drivers; - IIO ADC drivers; - Multiple devices driver; - Ethernet bonding driver; - Network drivers; - PCI subsystem; - VFIO drivers; - File systems infrastructure; - F2FS file system; - JFS file system; - Network file system (NFS) server daemon; - OCFS2 file system; - Overlay file system; - Tracing infrastructure; - IUCV driver; (CVE-2021-47633, CVE-2022-49058, CVE-2022-49170, CVE-2023-52784, CVE-2024-53194, CVE-2024-53210, CVE-2024-53214, CVE-2024-56570, CVE-2024-56616, CVE-2024-56763, CVE-2024-56779, CVE-2024-57904, CVE-2025-21664, CVE-2025-38604, CVE-2025-39743, CVE-2026-43456, CVE-2026-74350)

Ubuntu Security Notices guidance

Vendor revision: Nov 10, 2026
Vendor remediation details

This update corrects flaws in the following subsystems: - HID subsystem; - InfiniBand drivers; - Network drivers; - PCI subsystem; - SCSI subsystem; - JFS file system; - Network file system (NFS) client; - OCFS2 file system; (CVE-2022-49082, CVE-2025-39730, CVE-2025-39743, CVE-2025-39783, CVE-2025-39810, CVE-2025-39824, CVE-2026-74350, CVE-2026-74394)

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-2025-39743?

In the Linux kernel, the following vulnerability has been resolved:

jfs: truncate good inode pages when hard link is 0

The fileset value of the inode copy from the disk by the reproducer is AGGR_RESERVED_I. When executing evict, its hard link number is 0, so its inode pages are not truncated.

This causes the bugon to be triggered when executing clear_inode() because nrpages is greater than 0.

Source: NVD