CVE-2026-64490

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

ALSA: virtio: Validate control metadata from the device

virtio-snd control handling trusts the device-provided control type and value count returned by the device.

That metadata is then used directly to index gv2atypemap[] in virtsndkctlinfo(), and to size loops and memcpy() operations in virtsndkctlget() and virtsndkctlput() against fixed-size virtiosndctlvalue and sndctlelem_value arrays.

A buggy or malicious device can therefore trigger out-of-bounds access by advertising an invalid control type or an oversized value count.

Validate control type and count once in virtsndkctlparse_cfg(), before querying enumerated items or exposing the control to ALSA.