Bug 2393500 (CVE-2025-38736) - CVE-2025-38736 kernel: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
Summary: CVE-2025-38736 kernel: net: usb: asix_devices: Fix PHY address mask in MDIO b...
Keywords:
Status: NEW
Alias: CVE-2025-38736
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-09-05 18:02 UTC by OSIDB Bzimport
Modified: 2025-11-26 07:51 UTC (History)
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Description OSIDB Bzimport 2025-09-05 18:02:34 UTC
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.


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