What is CVE-2025-38688?

CVE-2025-38688 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.2 onward and patched in 6.6.103, 6.12.43, 6.15.11 and others. CVE-2025-38688 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-38688?

CVE-2025-38688 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-2025-38688?

Yes, CVE-2025-38688 has been patched. Fixed versions include 6.6.103, 6.12.43, 6.15.11 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-38688 actively exploited?

CVE-2025-38688 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-38688

High

In the Linux kernel, the following vulnerability has been resolved: iommufd: Prevent ALIGN() overflow When allocating IOVA the candidate range gets aligned to the target alignment. If the range is close to ULONG_MAX then the ALIGN() can wrap resulting in a corrupted iova. Open code the ALIGN() using get_add_overflow() to prevent this. This simplifies the checks as we don't need to check for length earlier either. Consolidate the two copies of this code under a single helper. This bug would allow userspace to create a mapping that overlaps with some other mapping or a reserved range.

Package Linux Kernel

Published 2025-09-04

Last modified 2025-11-24

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 6.2 and later are affected. Fixed in 6.6.103, 6.12.43, 6.15.11, 6.16.2, 6.17 and their respective stable series.

Affected from

≥ 6.2

Fixed in

✓ 6.6.103 6.6.x ✓ 6.12.43 6.12.x ✓ 6.15.11 6.15.x ✓ 6.16.2 6.16.x ✓ 6.17

References

The following references provide additional information about CVE-2025-38688 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/79fad1917802c28de51a479318a056a6fbe3e2f2
Patch
Kernel patch commit
https://git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeef
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2025-38688

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-09-04

Modified 2025-11-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-38688?

CVE-2025-38688 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.2 onward and has been patched in 6.6.103, 6.12.43, 6.15.11 and others. CVE-2025-38688 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-38688?

CVE-2025-38688 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-2025-38688?

Yes — CVE-2025-38688 has been patched. Fixed versions include 6.6.103, 6.12.43, 6.15.11 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-38688 actively exploited?

No — CVE-2025-38688 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.