GHSA-4QJ6-J88P-JQG9
Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-27 06:30In 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": [],
"aliases": [
"CVE-2026-64490"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-25T10:17:34Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: virtio: Validate control metadata from the device\n\nvirtio-snd control handling trusts the device-provided control type and\nvalue count returned by the device.\n\nThat metadata is then used directly to index g_v2a_type_map[] in\nvirtsnd_kctl_info(), and to size loops and memcpy() operations in\nvirtsnd_kctl_get() and virtsnd_kctl_put() against fixed-size\nvirtio_snd_ctl_value and snd_ctl_elem_value arrays.\n\nA buggy or malicious device can therefore trigger out-of-bounds access by\nadvertising an invalid control type or an oversized value count.\n\nValidate control type and count once in virtsnd_kctl_parse_cfg(), before\nquerying enumerated items or exposing the control to ALSA.",
"id": "GHSA-4qj6-j88p-jqg9",
"modified": "2026-07-27T06:30:40Z",
"published": "2026-07-25T12:31:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64490"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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