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CVE-2025-21998

4.7 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: firmware: qcom: uefisecapp: fix efivars registration race Since the conversion to using the TZ allocator, the efivars service i…

Published Apr 3, 2025CWE-367EPSS 0.14%

Overview

CVE-2025-21998 is a medium-severity vulnerability. It was published on April 3, 2025 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. 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:

firmware: qcom: uefisecapp: fix efivars registration race

Since the conversion to using the TZ allocator, the efivars service is

registered before the memory pool has been allocated, something which

can lead to a NULL-pointer dereference in case of a racing EFI variable

access.

Make sure that all resources have been set up before registering the

efivars.

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/c4e37b381a7a243c298a4858fc0a5a74e737c79aRefgit.kernel.org/stable/c/da8d493a80993972c427002684d0742560f3be4aRefgit.kernel.org/stable/c/f15a2b96a0e41c426c63a932d0e63cde7b9784aa

How CyberStrike helps

Frequently asked questions

What is CVE-2025-21998?

CVE-2025-21998 is a medium-severity vulnerability. It was published on April 3, 2025 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2025-21998?

This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-21998?

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-2025-21998?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-21998 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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