What is CVE-2025-39966?

CVE-2025-39966 is a high-severity vulnerability in Linux, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.0/10. Published 2025-10-15.

How severe is CVE-2025-39966?

High severity. CVSS v3 base score is 7.0 out of 10.

Vulnerability in Linux

CVE-2025-39966

In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix race during abort for file descriptors fput() doesn't actually call file_operations release() synchronously, it puts the file on a work queue and it will be…

Vulnerability class: Race Condition

EPSS: 0.001 (1.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 07838f7fd529c8a6de44b601d4b7057e6c8d36ed, 6.11, 0
Linux Linux_kernel — versions 6.17

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2025-39966?: CVE-2025-39966 is a high-severity vulnerability in Linux, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.0/10. Published 2025-10-15.
How severe is CVE-2025-39966?: High severity. CVSS v3 base score is 7.0 out of 10.