CVE-2026-64490 is a vulnerability in Linux Kernel
Published on July 25, 2026
ALSA: virtio: Validate control metadata from the device
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.
Products Associated with CVE-2026-64490
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Affected Versions
Linux:- Version d6568e3de42dd971a1356f7ba581e6600d53f0a0 and below 3243563f99ef5d3949b934bd6390a5679405d0e1 is affected.
- Version d6568e3de42dd971a1356f7ba581e6600d53f0a0 and below 5da9742de22db0dbaa8d414214ab5e1bedde00f9 is affected.
- Version d6568e3de42dd971a1356f7ba581e6600d53f0a0 and below 21584672fd699abe1768241d6c501b2de6139b6a is affected.
- Version d6568e3de42dd971a1356f7ba581e6600d53f0a0 and below c77a6cbb36ff8cbc1f084d94f8dcda5250935271 is affected.
- Version 6.9 is affected.
- Before 6.9 is unaffected.
- Version 6.12.96, <= 6.12.* is unaffected.
- Version 6.18.39, <= 6.18.* is unaffected.
- Version 7.1.4, <= 7.1.* is unaffected.
- Version 7.2-rc1, <= * is unaffected.