What is CVE-2025-37963?

CVE-2025-37963 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-2025-37963 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-37963?

CVE-2025-37963 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-2025-37963?

Yes, CVE-2025-37963 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-2025-37963 actively exploited?

CVE-2025-37963 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-37963

Medium

In the Linux kernel, the following vulnerability has been resolved: arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users Support for eBPF programs loaded by unprivileged users is typically disabled. This means only cBPF programs need to be mitigated for BHB. In addition, only mitigate cBPF programs that were loaded by an unprivileged user. Privileged users can also load the same program via eBPF, making the mitigation pointless.

Package Linux Kernel

Published 2025-05-20

Last modified 2025-12-16

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-2025-37963 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/038866e01ea5e5a3d948898ac216e531e7848669
Patch
Kernel patch commit
https://git.kernel.org/stable/c/477481c4348268136227348984b6699d6370b685
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6e52d043f7dbf1839a24a3fab2b12b0d3839de7a
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2025-37963

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-05-20

Modified 2025-12-16

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-37963?

CVE-2025-37963 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-2025-37963 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-37963?

CVE-2025-37963 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-2025-37963?

Yes — CVE-2025-37963 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-2025-37963 actively exploited?

No — CVE-2025-37963 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.