CVE-2025-38736
published 2025-09-05CVE-2025-38736: In the Linux kernel, the following vulnerability has been resolved: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization Syzbot reported…
PriorityP428high7.1CVSS 3.1
AVLACLPRLUINSUCHINAH
EPSS
0.15%
4.9th percentile
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
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.153-1 (bookworm) | linux 6.1.153-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.153-1 (bookworm) | linux 6.1.153-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 4faff70959d51078f9ee8372f8cff0d7045e4114 < 24ef2f53c07f273bad99173e27ee88d44d135b1c | 24ef2f53c07f273bad99173e27ee88d44d135b1c |
| linux | linux | >= 59ed6fbdb1bc03316e09493ffde7066f031c7524 < 8f141f2a4f2ef8ca865d5921574c3d6535e00a49 | 8f141f2a4f2ef8ca865d5921574c3d6535e00a49 |
| linux | linux | >= 6.12.43 < 6.12.44 | 6.12.44 |
| linux | linux | >= 6.15.11 < 6.16 | 6.16 |
| linux | linux | >= 6.16.2 < 6.16.4 | 6.16.4 |
| linux | linux | >= 75947d3200de98a9ded9ad8972e02f1a177097fe < fcb4ce9f729c1d08e53abf9d449340e24c3edee6 | fcb4ce9f729c1d08e53abf9d449340e24c3edee6 |
| linux | linux | >= ad1f8313aeec0115f9978bd2d002ef4a8d96c773 < 523eab02fce458fa6d3c51de5bb055800986953e | 523eab02fce458fa6d3c51de5bb055800986953e |
| linux | linux | >= ccef5ee4adf56472aa26bdd1f821a6d0cd06089a < 748da80831221ae24b4bc8d7ffb22acd5712a341 | 748da80831221ae24b4bc8d7ffb22acd5712a341 |
| linux | linux | >= ee2cd40b0bb46056949a2319084a729d95389386 < 22042ffedd8c2c6db08ccdd6d4273068eddd3c5c | 22042ffedd8c2c6db08ccdd6d4273068eddd3c5c |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.1.153-1 | 6.1.153-1 |
| linux | linux_kernel | >= 0 < 6.12.48-1 | 6.12.48-1 |
| linux | linux_kernel | >= 0 < 6.16.5-1 | 6.16.5-1 |
| linux | linux_kernel | >= 6.15.11 < 6.16 | 6.16 |
| linux | linux_kernel | >= 6.16.2 < 6.16.4 | 6.16.4 |
| msrc | azl3_kernel_6.6.96.2-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_kernel_6.6.96.2-2_on_azure_linux_3.0 | — | — |
CVSS provenance
nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
osv7.1HIGH
vendor_debian7.1HIGH
vendor_redhat7.1HIGH
vendor_msrc5.5MEDIUM
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GHSA
GHSA-9pqv-7h63-32cr: In the Linux kernel, the following vulnerability has been resolved:
net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
Syzbot r
ghsa_unreviewed·2025-09-05
CVE-2025-38736 [HIGH] CWE-125 GHSA-9pqv-7h63-32cr: In the Linux kernel, the following vulnerability has been resolved:
net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
Syzbot r
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.
OSV
CVE-2025-38736: In the Linux kernel, the following vulnerability has been resolved: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization Syzbot rep
osv·2025-09-05·CVSS 7.1
CVE-2025-38736 [HIGH] CVE-2025-38736: In the Linux kernel, the following vulnerability has been resolved: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization Syzbot rep
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.
Microsoft
net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
vendor_msrc·2025-09-09·CVSS 5.5
CVE-2025-38736 [HIGH] net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Referenc
Red Hat
kernel: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
vendor_redhat·2025-09-05·CVSS 7.1
CVE-2025-38736 [HIGH] kernel: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
kernel: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization
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.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affe
Debian
CVE-2025-38736: linux - In the Linux kernel, the following vulnerability has been resolved: net: usb: a...
vendor_debian·2025·CVSS 7.1
CVE-2025-38736 [HIGH] CVE-2025-38736: linux - In the Linux kernel, the following vulnerability has been resolved: net: usb: a...
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.
Scope: local
bookworm: resolved (fixed in 6.1.153-1)
bullseye: resolved
forky: resolved (fixed in 6.16.5-1)
sid: resolved (fixed in 6.16.5-1)
trixie: resolved (fixed in 6.12.48-1)
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/22042ffedd8c2c6db08ccdd6d4273068eddd3c5chttps://git.kernel.org/stable/c/24ef2f53c07f273bad99173e27ee88d44d135b1chttps://git.kernel.org/stable/c/523eab02fce458fa6d3c51de5bb055800986953ehttps://git.kernel.org/stable/c/748da80831221ae24b4bc8d7ffb22acd5712a341https://git.kernel.org/stable/c/8f141f2a4f2ef8ca865d5921574c3d6535e00a49https://git.kernel.org/stable/c/fcb4ce9f729c1d08e53abf9d449340e24c3edee6https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-019113.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-032379.html
2025-09-05
Published