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().

Classification

CVE ID: CVE-2025-37946

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 4.26% (scored less or equal to compared to others)

EPSS Date: 2025-06-18 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-37946
https://git.kernel.org/stable/c/c488f8b53e156d6dcc0514ef0afa3a33376b8f9e
https://git.kernel.org/stable/c/957529baef142d95e0d1b1bea786675bd47dbe53
https://git.kernel.org/stable/c/05a2538f2b48500cf4e8a0a0ce76623cc5bafcf1

Timeline