CVE-2025-38110
net/mdiobus: Fix potential out-of-bounds clause 45 read/write access
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net/mdiobus: Fix potential out-of-bounds clause 45 read/write access
In the Linux kernel, the following vulnerability has been resolved: net/mdiobus: Fix potential out-of-bounds clause 45 read/write access When using publicly available tools like 'mdio-tools' to read/write data from/to network interface and its PHY via C45 (clause 45) 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 C45 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/abb0605ca00979a49572a6516f6db22c3dc57223
git.kernel.org/...c/31bf7b2b92563a352788cf9df3698682f659bacc
git.kernel.org/...c/4ded22f7f3ce9714ed72c3e9c68fea1cb9388ae7
git.kernel.org/...c/260388f79e94fb3026c419a208ece8358bb7b555
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