CVE-2026-31778

A flaw was found in the Linux kernel's ALSA caiaq driver. A local user with a specially crafted USB device, containing a product name with many non-ASCII or non-space characters, can trigger a stack out-of-bounds read. This vulnerability allows the system to read past the end of a stack buffer, potentially leading to information disclosure from the kernel stack.

caiaq init_card could read past a stack buffer for certain descriptor layouts; upstream bounds the access. Red Hat recommends kernel errata; unload snd_usb_caiaq if the device class is absent.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, prevent the snd_usb_caiaq module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.