ALSA: virtio: Validate control metadata from the device

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64490
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:34 UTC
Updated2026-07-25 10:17:34 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.002090000 probability, percentile 0.111720000 (date 2026-07-25)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 3243563f99ef5d3949b934bd6390a5679405d0e1 git Not specified
CNA Linux Linux affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 5da9742de22db0dbaa8d414214ab5e1bedde00f9 git Not specified
CNA Linux Linux affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 21584672fd699abe1768241d6c501b2de6139b6a git Not specified
CNA Linux Linux affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 c77a6cbb36ff8cbc1f084d94f8dcda5250935271 git Not specified
CNA Linux Linux affected 6.9 Not specified
CNA Linux Linux unaffected 6.9 semver Not specified
CNA Linux Linux unaffected 6.12.96 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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