What is CVE-2025-38504?

CVE-2025-38504 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 6.15.7 and 6.16. CVE-2025-38504 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-38504?

CVE-2025-38504 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-2025-38504?

Yes, CVE-2025-38504 has been patched. Fixed versions include 6.15.7 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-2025-38504 actively exploited?

CVE-2025-38504 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-38504

Medium

In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix pp destruction warnings With multiple page pools and in some other cases we can have allocated niovs on page pool destruction. Remove a misplaced warning checking that all niovs are returned to zcrx on io_pp_zc_destroy(). It was reported before but apparently got lost.

Package Linux Kernel

Published 2025-08-16

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 6.15.7, 6.16 and their respective stable series.

Affected from

≥ 6.15

Fixed in

✓ 6.15.7 6.15.x ✓ 6.16

References

The following references provide additional information about CVE-2025-38504 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/203817de269539c062724d97dfa5af3cdf77a3ec
Patch
Kernel patch commit
https://git.kernel.org/stable/c/ad9f1b5bed082b9c910e2a24bae0286a70846909
Patch

Details

CVE ID CVE-2025-38504

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-08-16

Modified 2025-11-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-38504?

CVE-2025-38504 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 6.15.7 and 6.16. CVE-2025-38504 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-38504?

CVE-2025-38504 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-2025-38504?

Yes — CVE-2025-38504 has been patched. Fixed versions include 6.15.7 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-2025-38504 actively exploited?

No — CVE-2025-38504 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.