Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
080bb352fad00d04995102f681b134e3754bfb6e to < 19c5875e26c4ed5686d82a7d8f7051385461b9ebaffected080bb352fad00d04995102f681b134e3754bfb6e to < 014ad9210373d2104f6ef10e6bb999a7a0a4c50eaffected080bb352fad00d04995102f681b134e3754bfb6e to < 73d478234a619f3476028cb02dee699c30ae8262affected080bb352fad00d04995102f681b134e3754bfb6e to < bab6bca0834cbb5be2a7cfe59ec6ad016ec72608affected080bb352fad00d04995102f681b134e3754bfb6e to < b02d9d2732483e670bc34cb233d28e1d43b15da4affected080bb352fad00d04995102f681b134e3754bfb6e to < 049af7ac45a6b407748ee0995278fd861e36df8faffected080bb352fad00d04995102f681b134e3754bfb6e to < 0e629694126ca388916f059453a1c36adde219c4affected
Linux Linux
Default version status: affected
5.6affected0 to < 5.6unaffected5.10.239 to ≤ 5.10.*unaffected5.15.186 to ≤ 5.15.*unaffected6.1.142 to ≤ 6.1.*unaffected6.6.94 to ≤ 6.6.*unaffected6.12.34 to ≤ 6.12.*unaffected6.15.3 to ≤ 6.15.*unaffected6.16 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/19c5875e26c4ed5686d82a7d8f7051385461b9eb ↗
- https://git.kernel.org/stable/c/014ad9210373d2104f6ef10e6bb999a7a0a4c50e ↗
- https://git.kernel.org/stable/c/73d478234a619f3476028cb02dee699c30ae8262 ↗
- https://git.kernel.org/stable/c/bab6bca0834cbb5be2a7cfe59ec6ad016ec72608 ↗
- https://git.kernel.org/stable/c/b02d9d2732483e670bc34cb233d28e1d43b15da4 ↗
- https://git.kernel.org/stable/c/049af7ac45a6b407748ee0995278fd861e36df8f ↗
- https://git.kernel.org/stable/c/0e629694126ca388916f059453a1c36adde219c4 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗