What is CVE-2025-38366?

CVE-2025-38366 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.13 onward and patched in 6.15.5 and 6.16. CVE-2025-38366 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-38366?

CVE-2025-38366 has a CVSS score of 7.8 out of 10, rated High severity. 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-2025-38366?

Yes, CVE-2025-38366 has been patched. Fixed versions include 6.15.5 and 6.16. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-38366 actively exploited?

CVE-2025-38366 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-38366

High

In the Linux kernel, the following vulnerability has been resolved: LoongArch: KVM: Check validity of "num_cpu" from user space The maximum supported cpu number is EIOINTC_ROUTE_MAX_VCPUS about irqchip EIOINTC, here add validation about cpu number to avoid array pointer overflow.

Package Linux Kernel

Published 2025-07-25

Last modified 2025-11-18

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

Affected versions

Linux kernel versions 6.13 and later are affected. Fixed in 6.15.5, 6.16 and their respective stable series.

Affected from

≥ 6.13

Fixed in

✓ 6.15.5 6.15.x ✓ 6.16

References

The following references provide additional information about CVE-2025-38366 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/a3293b4078ee93174f70f36d3ab7618554ce6ab6
Patch
Kernel patch commit
https://git.kernel.org/stable/c/cc8d5b209e09d3b52bca1ffe00045876842d96ae
Patch

Details

CVE ID CVE-2025-38366

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-07-25

Modified 2025-11-18

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-38366?

CVE-2025-38366 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.13 onward and has been patched in 6.15.5 and 6.16. CVE-2025-38366 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-38366?

CVE-2025-38366 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-2025-38366?

Yes — CVE-2025-38366 has been patched. Fixed versions include 6.15.5 and 6.16. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-38366 actively exploited?

No — CVE-2025-38366 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.