What is CVE-2025-39781?

CVE-2025-39781 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.6.35 onward and patched in 6.6.103, 6.12.44, 6.16.4 and others. CVE-2025-39781 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-39781?

CVE-2025-39781 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2025-39781?

Yes, CVE-2025-39781 has been patched. Fixed versions include 6.6.103, 6.12.44, 6.16.4 and others. If you are running Linux kernel 6.6.35 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-39781 actively exploited?

CVE-2025-39781 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-39781

Medium

In the Linux kernel, the following vulnerability has been resolved: parisc: Drop WARN_ON_ONCE() from flush_cache_vmap I have observed warning to occassionally trigger.

Package Linux Kernel

Published 2025-09-11

Last modified 2025-11-25

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 6.6.35, 6.9.6, 6.10 and later are affected. Fixed in 6.6.103, 6.12.44, 6.16.4, 6.17 and their respective stable series.

Affected from

≥ 6.6.35 ≥ 6.9.6 ≥ 6.10

Fixed in

✓ 6.6.103 6.6.x ✓ 6.12.44 6.12.x ✓ 6.16.4 6.16.x ✓ 6.17

References

The following references provide additional information about CVE-2025-39781 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/4afb1352b85d7deb777694fba16d13c30c08776f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4eab1c27ce1f0e89ab67b01bf1e4e4c75215708a
Patch
Kernel patch commit
https://git.kernel.org/stable/c/69cf90e5aa50fe3cb0c1a63cabc4761db44b0035
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2025-39781

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-09-11

Modified 2025-11-25

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-39781?

CVE-2025-39781 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.6.35 onward and has been patched in 6.6.103, 6.12.44, 6.16.4 and others. CVE-2025-39781 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-39781?

CVE-2025-39781 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2025-39781?

Yes — CVE-2025-39781 has been patched. Fixed versions include 6.6.103, 6.12.44, 6.16.4 and others. If you are running Linux kernel 6.6.35 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-39781 actively exploited?

No — CVE-2025-39781 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.