CVE-2025-71196
Unknown Unknown - Not Provided
Off-by-One Vulnerability in Linux stm32-usphyc USB PHY Probe

Publication date: 2026-02-04

Last updated on: 2026-02-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: phy: stm32-usphyc: Fix off by one in probe() The "index" variable is used as an index into the usbphyc->phys[] array which has usbphyc->nphys elements. So if it is equal to usbphyc->nphys then it is one element out of bounds. The "index" comes from the device tree so it's data that we trust and it's unlikely to be wrong, however it's obviously still worth fixing the bug. Change the > to >=.
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Meta Information
Published
2026-02-04
Last Modified
2026-02-06
Generated
2026-06-16
AI Q&A
2026-02-04
EPSS Evaluated
2026-06-14
NVD
CVE-2025-71196
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is an off-by-one error in the Linux kernel's stm32-usphyc driver during the probe() function.

Specifically, the 'index' variable is used to access elements in the usbphyc->phys[] array, which has usbphyc->nphys elements.

If 'index' equals usbphyc->nphys, it goes one element out of bounds, which is an invalid access.

The 'index' value comes from the device tree, which is generally trusted, but the bug was fixed by changing the condition from '>' to '>=' to prevent this out-of-bounds access.

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