net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
Summary
| CVE | CVE-2025-38736 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-09-05 18:15:42 UTC |
| Updated | 2026-05-12 13:17:03 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.1 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Problem Types: CWE-125
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 75947d3200de98a9ded9ad8972e02f1a177097fe fcb4ce9f729c1d08e53abf9d449340e24c3edee6 git | Not specified |
| CNA | Linux | Linux | affected 59ed6fbdb1bc03316e09493ffde7066f031c7524 8f141f2a4f2ef8ca865d5921574c3d6535e00a49 git | Not specified |
| CNA | Linux | Linux | affected ccef5ee4adf56472aa26bdd1f821a6d0cd06089a 748da80831221ae24b4bc8d7ffb22acd5712a341 git | Not specified |
| CNA | Linux | Linux | affected ee2cd40b0bb46056949a2319084a729d95389386 22042ffedd8c2c6db08ccdd6d4273068eddd3c5c git | Not specified |
| CNA | Linux | Linux | affected ad1f8313aeec0115f9978bd2d002ef4a8d96c773 523eab02fce458fa6d3c51de5bb055800986953e git | Not specified |
| CNA | Linux | Linux | affected 4faff70959d51078f9ee8372f8cff0d7045e4114 24ef2f53c07f273bad99173e27ee88d44d135b1c git | Not specified |
| CNA | Linux | Linux | affected a754ab53993b1585132e871c5d811167ad3c52ff git | Not specified |
| CNA | Linux | Linux | affected 6.12.43 6.12.44 semver | Not specified |
| CNA | Linux | Linux | affected 6.16.2 6.16.4 semver | Not specified |
| ADP | Siemens | SIMATIC CN 4100 | affected V5.0 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| lists.debian.org/debian-lts-announce/2025/10/msg00008.html | af854a3a-2127-422b-91ae-364da2661108 | lists.debian.org | Third Party Advisory |
| git.kernel.org/stable/c/523eab02fce458fa6d3c51de5bb055800986953e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/fcb4ce9f729c1d08e53abf9d449340e24c3edee6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/22042ffedd8c2c6db08ccdd6d4273068eddd3c5c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| cert-portal.siemens.com/productcert/html/ssa-032379.html | 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e | cert-portal.siemens.com | |
| git.kernel.org/stable/c/24ef2f53c07f273bad99173e27ee88d44d135b1c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/8f141f2a4f2ef8ca865d5921574c3d6535e00a49 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/748da80831221ae24b4bc8d7ffb22acd5712a341 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.