What is CVE-2025-37939?

CVE-2025-37939 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.13 onward and patched in 6.13.11, 6.14.2 and 6.15. CVE-2025-37939 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-37939?

CVE-2025-37939 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:H/I:N/A:N.

Is there a patch available for CVE-2025-37939?

Yes, CVE-2025-37939 has been patched. Fixed versions include 6.13.11, 6.14.2 and 6.15. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-37939 actively exploited?

CVE-2025-37939 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-37939

Medium

In the Linux kernel, the following vulnerability has been resolved: libbpf: Fix accessing BTF.ext core_relo header Update btf_ext_parse_info() to ensure the core_relo header is present before reading its fields. This avoids a potential buffer read overflow reported by the OSS Fuzz project.

Package Linux Kernel

Published 2025-05-20

Last modified 2025-11-17

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

High

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-120

CVE-2025-37939 is classified as CWE-120

See CWE-120 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.13 and later are affected. Fixed in 6.13.11, 6.14.2, 6.15 and their respective stable series.

Affected from

≥ 6.13

Fixed in

✓ 6.13.11 6.13.x ✓ 6.14.2 6.14.x ✓ 6.15

References

The following references provide additional information about CVE-2025-37939 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/0a7c2a84359612e54328aa52030eb202093da6e2
Patch
Kernel patch commit
https://git.kernel.org/stable/c/3a67f60f0a8be10cea7a884a1a00e9feb6645657
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d529411ec44535308c5d59cbeff74be6fe14b479
Patch

Details

CVE ID CVE-2025-37939

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-05-20

Modified 2025-11-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-37939?

CVE-2025-37939 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.13 onward and has been patched in 6.13.11, 6.14.2 and 6.15. CVE-2025-37939 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-37939?

CVE-2025-37939 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:H/I:N/A:N.
Is there a patch available for CVE-2025-37939?

Yes — CVE-2025-37939 has been patched. Fixed versions include 6.13.11, 6.14.2 and 6.15. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-37939 actively exploited?

No — CVE-2025-37939 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.