CVE-2025-38111
net/mdiobus: Fix potential out-of-bounds read/write access
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net/mdiobus: Fix potential out-of-bounds read/write access
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.
Reserved 2025-04-16 | Published 2025-07-03 | Updated 2025-07-03 | Assigner Linuxgit.kernel.org/...c/19c5875e26c4ed5686d82a7d8f7051385461b9eb
git.kernel.org/...c/014ad9210373d2104f6ef10e6bb999a7a0a4c50e
git.kernel.org/...c/73d478234a619f3476028cb02dee699c30ae8262
git.kernel.org/...c/bab6bca0834cbb5be2a7cfe59ec6ad016ec72608
git.kernel.org/...c/b02d9d2732483e670bc34cb233d28e1d43b15da4
git.kernel.org/...c/049af7ac45a6b407748ee0995278fd861e36df8f
git.kernel.org/...c/0e629694126ca388916f059453a1c36adde219c4
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