CVE-2026-64490

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd6568e3de42dd971a1356f7ba581e6600d53f0a0 < 3243563f99ef5d3949b934bd6390a5679405d0e1affected
LinuxLinuxd6568e3de42dd971a1356f7ba581e6600d53f0a0 < 5da9742de22db0dbaa8d414214ab5e1bedde00f9affected
LinuxLinuxd6568e3de42dd971a1356f7ba581e6600d53f0a0 < 21584672fd699abe1768241d6c501b2de6139b6aaffected
LinuxLinuxd6568e3de42dd971a1356f7ba581e6600d53f0a0 < c77a6cbb36ff8cbc1f084d94f8dcda5250935271affected
LinuxLinux6.9affected
LinuxLinux0 < 6.9unaffected
LinuxLinux6.12.96 <= 6.12.*unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References