CVE-2025-39870

High

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix double free in idxd_setup_wqs() The clean up in idxd_setup_wqs() has had a couple bugs because the error handling is a bit subtle. It's simpler to just re-write it in a cleaner way. The issues here are: 1) If "idxd->max_wqs" is <= 0 then we call put_device(conf_dev) when "conf_dev" hasn't been initialized. 2) If kzalloc_node() fails then again "conf_dev" is invalid. It's either uninitialized or it points to the "conf_dev" from the previous iteration so it leads to a double free. It's better to free partial loop iterations within the loop and then the unwinding at the end can handle whole loop iterations. I also renamed the labels to describe what the goto does and not where the goto was located.

Package Linux Kernel
Published 2025-09-23
Last modified 2026-01-20
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-415

CVE-2025-39870 is classified as CWE-415

See CWE-415 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.1.140, 6.6.92, 6.12.30, 6.14.8, 6.15 and later are affected. Fixed in 6.1.153, 6.6.107, 6.12.48, 6.16.8, 6.17 and their respective stable series.

Affected from
≥ 6.1.140 ≥ 6.6.92 ≥ 6.12.30 ≥ 6.14.8 ≥ 6.15
Fixed in
✓ 6.1.153 6.1.x ✓ 6.6.107 6.6.x ✓ 6.12.48 6.12.x ✓ 6.16.8 6.16.x ✓ 6.17

References

The following references provide additional information about CVE-2025-39870 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

5 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2025-39870?

    CVE-2025-39870 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.1.140 onward and has been patched in 6.1.153, 6.6.107, 6.12.48 and others. CVE-2025-39870 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2025-39870?

    CVE-2025-39870 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2025-39870?

    Yes — CVE-2025-39870 has been patched. Fixed versions include 6.1.153, 6.6.107, 6.12.48 and others. If you are running Linux kernel 6.1.140 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2025-39870 actively exploited?

    No — CVE-2025-39870 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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