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CVE-2025-37849

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Tear down vGIC on failed vCPU creation If kvm_arch_vcpu_create() fails to share the vCPU page with the hypervisor,…

Published May 9, 2025CWE-416EPSS 0.27%

Overview

CVE-2025-37849 is a high-severity vulnerability. It was published on May 9, 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: Tear down vGIC on failed vCPU creation

If kvm_arch_vcpu_create() fails to share the vCPU page with the

hypervisor, we propagate the error back to the ioctl but leave the

vGIC vCPU data initialised. Note only does this leak the corresponding

memory when the vCPU is destroyed but it can also lead to use-after-free

if the redistributor device handling tries to walk into the vCPU.

Add the missing cleanup to kvm_arch_vcpu_create(), ensuring that the

vGIC vCPU structures are destroyed on error.

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/07476e0d932afc53c05468076393ac35d0b4999eRefgit.kernel.org/stable/c/2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52Refgit.kernel.org/stable/c/250f25367b58d8c65a1b060a2dda037eea09a672Refgit.kernel.org/stable/c/5085e02362b9948f82fceca979b8f8e12acb1cc5Refgit.kernel.org/stable/c/c322789613407647a05ff5c451a7bf545fb34e73Refgit.kernel.org/stable/c/f1e9087abaeedec9bf2894a282ee4f0d8383f299Reflists.debian.org/debian-lts-announce/2025/05/msg00045.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-37849?

CVE-2025-37849 is a high-severity vulnerability. It was published on May 9, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-37849?

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-2025-37849?

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-2025-37849?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-37849 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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