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Change History

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

ALSA: scarlett2: Fix buffer overflow in config retrieval

The scarlett2_usb_get_config() function has a logic error in the
endianness conversion code that can cause buffer overflows when
count > 1.

The code checks `if (size == 2)` where `size` is the total buffer size in
bytes, then loops `count` times treating each element as u16 (2 bytes).
This causes the loop to access `count * 2` bytes when the buffer only
has `size` bytes allocated.

Fix by checking the element size (config_item->size) instead of the
total buffer size. This ensures the endianness conversion matches the
actual element type.

https://git.kernel.org/stable/c/27049f50be9f5ae3a62d272128ce0b381cb26a24

https://git.kernel.org/stable/c/31a3eba5c265a763260976674a22851e83128f6d

https://git.kernel.org/stable/c/6f5c69f72e50d51be3a8c028ae7eda42c82902cb

https://git.kernel.org/stable/c/91a756d22f0482eac5bedb113c8922f90b254449