Use After Free in Linux
CVE-2025-37946
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().
Vulnerability class: Use-After-Free
EPSS: 0.002 (6.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions bcb5d6c769039c8358a2359e7c3ea5d97ce93108, 6.9, 0
- Linux Linux_kernel — versions 6.15
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-37946?
- CVE-2025-37946 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2025-05-20.
- How severe is CVE-2025-37946?
- High severity. CVSS v3 base score is 7.8 out of 10.