CVE-2025-38736
net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
- State
- Published
- Severity
- Not scored
- Published
- Sep 5, 2025
- Updated
- Oct 15, 2026
- Reserved
- Apr 16, 2025
Description
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.
Scores
The record has no CVSS score.
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
LinuxLinux |
|
LinuxLinux |
|
References
- https://git.kernel.org/stable/c/fcb4ce9f729c1d08e53abf9d449340e24c3edee6
- https://git.kernel.org/stable/c/8f141f2a4f2ef8ca865d5921574c3d6535e00a49
- https://git.kernel.org/stable/c/748da80831221ae24b4bc8d7ffb22acd5712a341
- https://git.kernel.org/stable/c/22042ffedd8c2c6db08ccdd6d4273068eddd3c5c
- https://git.kernel.org/stable/c/523eab02fce458fa6d3c51de5bb055800986953e
- https://git.kernel.org/stable/c/24ef2f53c07f273bad99173e27ee88d44d135b1c
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
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