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CVE-2025-37946

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: s390/pci: Fix duplicate pci_dev_put() in disable_slot() when PF has child VFs With commit bcb5d6c76903 ("s390/pci: introduce lo…

Published May 20, 2025CWE-416EPSS 0.19%

Overview

CVE-2025-37946 is a high-severity vulnerability. It was published on May 20, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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:

s390/pci: Fix duplicate pci_dev_put() in disable_slot() when PF has child VFs

With commit bcb5d6c76903 ("s390/pci: introduce lock to synchronize state

of zpci_dev's") the code to ignore power off of a PF that has child VFs

was changed from a direct return to a goto to the unlock and

pci_dev_put() section. The change however left the existing pci_dev_put()

untouched resulting in a doubple put. This can subsequently cause a use

after free if the struct pci_dev is released in an unexpected state.

Fix this by removing the extra pci_dev_put().

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/05a2538f2b48500cf4e8a0a0ce76623cc5bafcf1Refgit.kernel.org/stable/c/957529baef142d95e0d1b1bea786675bd47dbe53Refgit.kernel.org/stable/c/c488f8b53e156d6dcc0514ef0afa3a33376b8f9e

How CyberStrike helps

Frequently asked questions

What is CVE-2025-37946?

CVE-2025-37946 is a high-severity vulnerability. It was published on May 20, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-37946?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2025-37946?

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-2025-37946?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-37946 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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