CVE-2025-38111

Summary

In the Linux kernel, the following vulnerability has been resolved:

net/mdiobus: Fix potential out-of-bounds read/write access

When using publicly available tools like 'mdio-tools' to read/write data from/to network interface and its PHY via mdiobus, there is no verification of parameters passed to the ioctl and it accepts any mdio address. Currently there is support for 32 addresses in kernel via PHY_MAX_ADDR define, but it is possible to pass higher value than that via ioctl. While read/write operation should generally fail in this case, mdiobus provides stats array, where wrong address may allow out-of-bounds read/write.

Fix that by adding address verification before read/write operation. While this excludes this access from any statistics, it improves security of read/write operation.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux080bb352fad00d04995102f681b134e3754bfb6e < 19c5875e26c4ed5686d82a7d8f7051385461b9ebaffected
LinuxLinux080bb352fad00d04995102f681b134e3754bfb6e < 014ad9210373d2104f6ef10e6bb999a7a0a4c50eaffected
LinuxLinux080bb352fad00d04995102f681b134e3754bfb6e < 73d478234a619f3476028cb02dee699c30ae8262affected
LinuxLinux080bb352fad00d04995102f681b134e3754bfb6e < bab6bca0834cbb5be2a7cfe59ec6ad016ec72608affected
LinuxLinux080bb352fad00d04995102f681b134e3754bfb6e < b02d9d2732483e670bc34cb233d28e1d43b15da4affected
LinuxLinux080bb352fad00d04995102f681b134e3754bfb6e < 049af7ac45a6b407748ee0995278fd861e36df8faffected
LinuxLinux080bb352fad00d04995102f681b134e3754bfb6e < 0e629694126ca388916f059453a1c36adde219c4affected
LinuxLinux5.6affected
LinuxLinux0 < 5.6unaffected
LinuxLinux5.10.239 <= 5.10.*unaffected
LinuxLinux5.15.186 <= 5.15.*unaffected
LinuxLinux6.1.142 <= 6.1.*unaffected
LinuxLinux6.6.94 <= 6.6.*unaffected
LinuxLinux6.12.34 <= 6.12.*unaffected
LinuxLinux6.15.3 <= 6.15.*unaffected
LinuxLinux6.16 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

Additional References

References