{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d6568e3de42dd971a1356f7ba581e6600d53f0a0"
            },
            {
              "fixed": "3243563f99ef5d3949b934bd6390a5679405d0e1"
            },
            {
              "fixed": "5da9742de22db0dbaa8d414214ab5e1bedde00f9"
            },
            {
              "fixed": "21584672fd699abe1768241d6c501b2de6139b6a"
            },
            {
              "fixed": "c77a6cbb36ff8cbc1f084d94f8dcda5250935271"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "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"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64490.json"
  },
  "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": "CVE-2026-64490",
  "modified": "2026-08-18T03:30:52.685282446Z",
  "published": "2026-07-25T08:51:48.877Z",
  "references": [
    {
      "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"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64490.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64490"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ALSA: virtio: Validate control metadata from the device"
}