CVE-2025-40221: media: pci: mg4b: fix uninitialized iio scan data

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-04 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: media: pci: mg4b: fix uninitialized iio scan data Fix potential leak of uninitialized stack data to userspace by ensuring that the `scan` structure is zeroed before use.

Affected products

Linux kernel: 6.7 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/b792eba44494b4e6ab5006013335f9819f303b8b
https://git.kernel.org/stable/c/b7f82da7f86479cb6479a76ebe213ece7c77398f
https://git.kernel.org/stable/c/c0d3f6969bb4d72476cfe7ea9263831f1c283704

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