What is CVE-2025-39795?

CVE-2025-39795 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Uncontrolled Recursion flaw (CWE-674), affecting Linux kernel versions from 5.10 onward and patched in 5.10.241, 5.15.190, 6.1.149 and others. CVE-2025-39795 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-39795?

CVE-2025-39795 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-2025-39795?

Yes, CVE-2025-39795 has been patched. Fixed versions include 5.10.241, 5.15.190, 6.1.149 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-39795 actively exploited?

CVE-2025-39795 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Uncontrolled Recursion (CWE-674)?

The product does not properly control the amount of recursion which triggers resource consumption. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/674.html

CVE-2025-39795

Medium

In the Linux kernel, the following vulnerability has been resolved: block: avoid possible overflow for chunk_sectors check in blk_stack_limits() In blk_stack_limits(), we check that the t->chunk_sectors value is a multiple of the t->physical_block_size value. However, by finding the chunk_sectors value in bytes, we may overflow the unsigned int which holds chunk_sectors, so change the check to be based on sectors.

Package Linux Kernel

Published 2025-09-12

Last modified 2026-07-14

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

Weakness type

CWE-674

CVE-2025-39795 is a Uncontrolled Recursion vulnerability

What is Uncontrolled Recursion?

The product does not properly control the amount of recursion which triggers resource consumption. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.10 and later are affected. Fixed in 5.10.241, 5.15.190, 6.1.149, 6.6.103, 6.12.43, 6.15.11, 6.16.2, 6.17 and their respective stable series.

Affected from

≥ 5.10

Fixed in

✓ 5.10.241 5.10.x ✓ 5.15.190 5.15.x ✓ 6.1.149 6.1.x ✓ 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

13 total

Kernel Git
https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392f

Patch
Kernel Git
https://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38

Patch
Kernel Git
https://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9

Patch
Kernel Git
https://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253

Patch
Kernel Git
https://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8

Patch

Showing 5 of 13 references View all on NVD

Details

CVE ID CVE-2025-39795

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-09-12

Modified 2026-07-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-39795?

CVE-2025-39795 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Uncontrolled Recursion flaw (CWE-674) . It affects Linux kernel versions from 5.10 onward and has been patched in 5.10.241, 5.15.190, 6.1.149 and others. CVE-2025-39795 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-39795?

CVE-2025-39795 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-2025-39795?

Yes. CVE-2025-39795 has been patched. Fixed versions include 5.10.241, 5.15.190, 6.1.149 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-39795 actively exploited?

No. CVE-2025-39795 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.