What is CVE-2025-38432?

CVE-2025-38432 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-2025-38432 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-38432?

CVE-2025-38432 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-2025-38432?

Yes, CVE-2025-38432 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-2025-38432 actively exploited?

CVE-2025-38432 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-38432

Medium

In the Linux kernel, the following vulnerability has been resolved: net: netpoll: Initialize UDP checksum field before checksumming commit f1fce08e63fe ("netpoll: Eliminate redundant assignment") removed the initialization of the UDP checksum, which was wrong and broke netpoll IPv6 transmission due to bad checksumming. udph->check needs to be set before calling csum_ipv6_magic().

Package Linux Kernel

Published 2025-07-25

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-2025-38432 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/353016ec159f939a380ff6746476a779367ba9a3
Patch
Kernel patch commit
https://git.kernel.org/stable/c/f5990207026987a353d5a95204c4d9cb725637fd
Patch

Details

CVE ID CVE-2025-38432

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-07-25

Modified 2025-11-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-38432?

CVE-2025-38432 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-2025-38432 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-38432?

CVE-2025-38432 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-2025-38432?

Yes — CVE-2025-38432 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-2025-38432 actively exploited?

No — CVE-2025-38432 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.