What is CVE-2025-38247?

CVE-2025-38247 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.15 onward and patched in 6.15.5 and 6.16. CVE-2025-38247 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-38247?

CVE-2025-38247 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-2025-38247?

Yes, CVE-2025-38247 has been patched. Fixed versions include 6.15.5 and 6.16. If you are running Linux kernel 6.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-38247 actively exploited?

CVE-2025-38247 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-38247

Medium

In the Linux kernel, the following vulnerability has been resolved: userns and mnt_idmap leak in open_tree_attr(2) Once want_mount_setattr() has returned a positive, it does require finish_mount_kattr() to release ->mnt_userns. Failing do_mount_setattr() does not change that. As the result, we can end up leaking userns and possibly mnt_idmap as well.

Package Linux Kernel

Published 2025-07-09

Last modified 2025-11-19

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 6.15 and later are affected. Fixed in 6.15.5, 6.16 and their respective stable series.

Affected from

≥ 6.15

Fixed in

✓ 6.15.5 6.15.x ✓ 6.16

References

The following references provide additional information about CVE-2025-38247 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/0748e553df0225754c316a92af3a77fdc057b358
Patch
Kernel patch commit
https://git.kernel.org/stable/c/142db4e76110dd80239f4e79810f85ea1735ad60
Patch

Details

CVE ID CVE-2025-38247

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-07-09

Modified 2025-11-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-38247?

CVE-2025-38247 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.15 onward and has been patched in 6.15.5 and 6.16. CVE-2025-38247 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-38247?

CVE-2025-38247 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-2025-38247?

Yes — CVE-2025-38247 has been patched. Fixed versions include 6.15.5 and 6.16. If you are running Linux kernel 6.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-38247 actively exploited?

No — CVE-2025-38247 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.