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CVE-2025-37938

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: tracing: Verify event formats that have "%*p.." The trace event verifier checks the formats of trace events to make sure that t…

Published May 20, 2025CWE-476EPSS 0.21%

Overview

CVE-2025-37938 is a high-severity vulnerability. It was published on May 20, 2025 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

tracing: Verify event formats that have "%*p.."

The trace event verifier checks the formats of trace events to make sure

that they do not point at memory that is not in the trace event itself or

in data that will never be freed. If an event references data that was

allocated when the event triggered and that same data is freed before the

event is read, then the kernel can crash by reading freed memory.

The verifier runs at boot up (or module load) and scans the print formats

of the events and checks their arguments to make sure that dereferenced

pointers are safe. If the format uses "%*p.." the verifier will ignore it,

and that could be dangerous. Cover this case as well.

Also add to the sample code a use case of "%*pbl".

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/03127354027508d076073b020d3070990fd6a958Refgit.kernel.org/stable/c/04b80d45ecfaf780981d6582899e3ab205e4aa08Refgit.kernel.org/stable/c/4d11fac941d83509be4e6a21038281d6d96da50cRefgit.kernel.org/stable/c/6854c87ac823181c810f8c07489ba543260c0023Refgit.kernel.org/stable/c/c7204fd1758c0caf1938e8a59809a1fdf28a8114Refgit.kernel.org/stable/c/ea8d7647f9ddf1f81e2027ed305299797299aa03Reflists.debian.org/debian-lts-announce/2025/05/msg00045.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-37938?

CVE-2025-37938 is a high-severity vulnerability. It was published on May 20, 2025 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2025-37938?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-37938?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-37938?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-37938 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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