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CVE-2025-37996

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix uninitialized memcache pointer in user_mem_abort() Commit fce886a60207 ("KVM: arm64: Plumb the pKVM MMU in KVM"…

Published May 29, 2025CWE-908EPSS 0.16%

Overview

CVE-2025-37996 is a high-severity vulnerability. It was published on May 29, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, 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:

KVM: arm64: Fix uninitialized memcache pointer in user_mem_abort()

Commit fce886a60207 ("KVM: arm64: Plumb the pKVM MMU in KVM") made the

initialization of the local memcache variable in user_mem_abort()

conditional, leaving a codepath where it is used uninitialized via

kvm_pgtable_stage2_map().

This can fail on any path that requires a stage-2 allocation

without transition via a permission fault or dirty logging.

Fix this by making sure that memcache is always valid.

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/157dbc4a321f5bb6f8b6c724d12ba720a90f1a7cRefgit.kernel.org/stable/c/a26d50f8a4a5049e956984797b5d0dedea4bbb18

How CyberStrike helps

Frequently asked questions

What is CVE-2025-37996?

CVE-2025-37996 is a high-severity vulnerability. It was published on May 29, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-37996?

This vulnerability has a CVSS 3.1 base score of 8.8, 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-2025-37996?

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-2025-37996?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-37996 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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