CVE-2025-37946

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

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().

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/c488f8b53e156d6dcc0514ef0afa3a33376b8f9e
https://git.kernel.org/stable/c/957529baef142d95e0d1b1bea786675bd47dbe53
https://git.kernel.org/stable/c/05a2538f2b48500cf4e8a0a0ce76623cc5bafcf1

Frequently Asked Questions

What is the severity of CVE-2025-37946?: CVE-2025-37946 has not yet been assigned a CVSS score.
How to fix CVE-2025-37946?: To fix CVE-2025-37946, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-37946 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-37946 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-37946?: CVE-2025-37946 affects Linux Linux, Linux Linux.

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