What is CVE-2025-37948?

CVE-2025-37948 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 3.7 onward and patched in 5.10.239, 5.15.186, 6.1.139 and others. CVE-2025-37948 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-37948?

CVE-2025-37948 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-2025-37948?

Yes, CVE-2025-37948 has been patched. Fixed versions include 5.10.239, 5.15.186, 6.1.139 and others. If you are running Linux kernel 3.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-37948 actively exploited?

CVE-2025-37948 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-37948

Medium

In the Linux kernel, the following vulnerability has been resolved: arm64: bpf: Add BHB mitigation to the epilogue for cBPF programs A malicious BPF program may manipulate the branch history to influence what the hardware speculates will happen next. On exit from a BPF program, emit the BHB mititgation sequence. This is only applied for 'classic' cBPF programs that are loaded by seccomp.

Package Linux Kernel

Published 2025-05-20

Last modified 2025-12-18

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 3.7 and later are affected. Fixed in 5.10.239, 5.15.186, 6.1.139, 6.6.91, 6.12.29, 6.14.7, 6.15 and their respective stable series.

Affected from

≥ 3.7

Fixed in

✓ 5.10.239 5.10.x ✓ 5.15.186 5.15.x ✓ 6.1.139 6.1.x ✓ 6.6.91 6.6.x ✓ 6.12.29 6.12.x ✓ 6.14.7 6.14.x ✓ 6.15

References

The following references provide additional information about CVE-2025-37948 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html

Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

Third Party Advisory
Kernel patch commit
https://git.kernel.org/stable/c/0dfefc2ea2f29ced2416017d7e5b1253a54c2735
Patch
Kernel patch commit
https://git.kernel.org/stable/c/38c345fd54afd9d6ed8d3fcddf3f6ea23887bf78
Patch
Kernel patch commit
https://git.kernel.org/stable/c/42a20cf51011788f04cf2adbcd7681f02bdb6c27
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2025-37948

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-05-20

Modified 2025-12-18

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-37948?

CVE-2025-37948 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 3.7 onward and has been patched in 5.10.239, 5.15.186, 6.1.139 and others. CVE-2025-37948 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-37948?

CVE-2025-37948 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-2025-37948?

Yes — CVE-2025-37948 has been patched. Fixed versions include 5.10.239, 5.15.186, 6.1.139 and others. If you are running Linux kernel 3.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-37948 actively exploited?

No — CVE-2025-37948 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.