CVE-2026-64490

{
  "id": "CVE-2026-64490",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-07-25T10:17:34.807",
  "lastModified": "2026-10-19T21:17:41.020",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "sound/virtio/virtio_kctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "d6568e3de42dd971a1356f7ba581e6600d53f0a0",
              "lessThan": "3243563f99ef5d3949b934bd6390a5679405d0e1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "d6568e3de42dd971a1356f7ba581e6600d53f0a0",
              "lessThan": "5da9742de22db0dbaa8d414214ab5e1bedde00f9",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "d6568e3de42dd971a1356f7ba581e6600d53f0a0",
              "lessThan": "21584672fd699abe1768241d6c501b2de6139b6a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "d6568e3de42dd971a1356f7ba581e6600d53f0a0",
              "lessThan": "c77a6cbb36ff8cbc1f084d94f8dcda5250935271",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "sound/virtio/virtio_kctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.9",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.9",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.96",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.39",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.4",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-16T15:41:24.261293Z",
          "id": "CVE-2026-64490",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}