CVE-2025-38736: Debian Linux

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization Syzbot reported shift-out-of-bounds exception on MDIO bus initialization. The PHY address should be masked to 5 bits (0-31). Without this mask, invalid PHY addresses could be used, potentially causing issues with MDIO bus operations. Fix this by masking the PHY address with 0x1f (31 decimal) to ensure it stays within the valid range.

Affected products

• Debian Debian Linux: version 11.0 only
• Linux Linux Kernel: from 6.15.11, before 6.16 (fixed in 6.16); from 6.16.2, before 6.16.4 (fixed in 6.16.4); version 6.12.43 only; version 6.17 only

Published 2025-09-05. Last modified 2026-07-14.