PT-2026-64711 · Linux · Linux

CVE-2026-64490 · Published 2026-07-25 · Updated 2026-07-25

Mitre

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 g v2a type map[] in virtsnd kctl info(), and to size loops and memcpy() operations in virtsnd kctl get() and virtsnd kctl put() against fixed-size virtio snd ctl value and snd ctl elem 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 virtsnd kctl parse cfg(), before querying enumerated items or exposing the control to ALSA.

Related Identifiers

CVE-2026-64490

Affected Products

Linux

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-64490 · Security Note
• https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1 · Note
• https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271 · Note
• https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a · Note
• https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9 · Note