ALSA: virtio: Validate control metadata from the device

{
  "id": "5a0876633e986fee2ab299f189622a84b8e637a6325f5ff87ae6f70e7a036ecf",
  "url": "https://osv.dev/vulnerability/CVE-2026-64490",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ALSA: virtio: Validate control metadata from the device",
    "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.",
    "evidence": "osv:CVE-2026-64490",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.96",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.39",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-64490",
      "aliases": [
        "CVE-2026-64490"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d6568e3de42dd971a1356f7ba581e6600d53f0a0"
                },
                {
                  "fixed": "3243563f99ef5d3949b934bd6390a5679405d0e1"
                },
                {
                  "fixed": "5da9742de22db0dbaa8d414214ab5e1bedde00f9"
                },
                {
                  "fixed": "21584672fd699abe1768241d6c501b2de6139b6a"
                },
                {
                  "fixed": "c77a6cbb36ff8cbc1f084d94f8dcda5250935271"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64490.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.9.0"
                },
                {
                  "fixed": "6.12.96"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.39"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64490.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.077500831Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a",
        "https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1",
        "https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9",
        "https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64490.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64490",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64490.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64490",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503505,
  "published_at": "2026-07-25T08:51:48.877+00:00"
}