CVE-2026-23078

Summary

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.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/d5e80d1f97ae55bcea1426f551e4419245b41b9c
• https://git.kernel.org/stable/c/51049f6e3f05d70660e2458ad3bb302a3721b751
• https://git.kernel.org/stable/c/91a756d22f0482eac5bedb113c8922f90b254449
• https://git.kernel.org/stable/c/27049f50be9f5ae3a62d272128ce0b381cb26a24
• https://git.kernel.org/stable/c/31a3eba5c265a763260976674a22851e83128f6d
• https://git.kernel.org/stable/c/6f5c69f72e50d51be3a8c028ae7eda42c82902cb

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