What is CVE-2025-39754?

CVE-2025-39754 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10, classified as a Race Condition flaw (CWE-362), affecting Linux kernel versions from 4.4 onward and patched in 6.12.43, 6.15.11, 6.16.2 and others. CVE-2025-39754 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-39754?

CVE-2025-39754 has a CVSS score of 4.7 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2025-39754?

Yes, CVE-2025-39754 has been patched. Fixed versions include 6.12.43, 6.15.11, 6.16.2 and others. If you are running Linux kernel 4.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-39754 actively exploited?

CVE-2025-39754 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2025-39754

Medium

In the Linux kernel, the following vulnerability has been resolved: mm/smaps: fix race between smaps_hugetlb_range and migration smaps_hugetlb_range() handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). The race is as follows. smaps_hugetlb_range migrate_pages huge_ptep_get remove_migration_ptes folio_unlock pfn_swap_entry_folio BUG_ON To fix it, hold ptl lock in smaps_hugetlb_range().

Package Linux Kernel

Published 2025-09-11

Last modified 2025-11-26

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

4.7

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-362

CVE-2025-39754 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.4 and later are affected. Fixed in 6.12.43, 6.15.11, 6.16.2, 6.17 and their respective stable series.

Affected from

≥ 4.4

Fixed in

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

References

4 total

Kernel Git
https://git.kernel.org/stable/c/09fc018f48871123ad5dbd7b03c956580232ed76

Patch
Kernel Git
https://git.kernel.org/stable/c/2a1f3663974162b8f1e098196f557cfc1d160138

Patch
Kernel Git
https://git.kernel.org/stable/c/45d19b4b6c2d422771c29b83462d84afcbb33f01

Patch
Kernel Git
https://git.kernel.org/stable/c/b625883ccbcc2b57808db51d1375b1d7b9bcb3e5

Patch

Details

CVE ID CVE-2025-39754

Severity Medium

CVSS score 4.7 / 10

CVSS version 3.1

Published 2025-09-11

Modified 2025-11-26

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-39754?

CVE-2025-39754 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.7 out of 10 , classified as a Race Condition flaw (CWE-362) . It affects Linux kernel versions from 4.4 onward and has been patched in 6.12.43, 6.15.11, 6.16.2 and others. CVE-2025-39754 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-39754?

CVE-2025-39754 has a CVSS score of 4.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2025-39754?

Yes. CVE-2025-39754 has been patched. Fixed versions include 6.12.43, 6.15.11, 6.16.2 and others. If you are running Linux kernel 4.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-39754 actively exploited?

No. CVE-2025-39754 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.