CVE-2025-40004 is a low severity vulnerability with a CVSS score of 0.0. No known exploits currently, and patches are available.
Very low probability of exploitation
EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.
In the Linux kernel, the following vulnerability has been resolved:
net/9p: Fix buffer overflow in USB transport layer
A buffer overflow vulnerability exists in the USB 9pfs transport layer where inconsistent size validation between packet header parsing and actual data copying allows a malicious USB host to overflow heap buffers.
The issue occurs because:
This allows an attacker to craft packets with small declared size (bypassing validation) but large actual payload (triggering overflow in memcpy).
Add validation in usb9pfs_rx_complete() to ensure req->actual does not exceed the buffer capacity before copying data.
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