{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/sof/ipc4-control.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "266f936db83aee6ca6473bbb06259bda52bf4fc3",
              "status": "affected",
              "version": "a062c8899fede2ab5660a817e9b602d3fa280a99",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "a062c8899fede2ab5660a817e9b602d3fa280a99",
              "versionType": "git"
            },
            {
              "lessThan": "fb4293173db2d474d8fbc0e5ecf4943e6df2b40e",
              "status": "affected",
              "version": "a062c8899fede2ab5660a817e9b602d3fa280a99",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "a062c8899fede2ab5660a817e9b602d3fa280a99",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "a062c8899fede2ab5660a817e9b602d3fa280a99",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/sof/ipc4-control.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc4-control: Fix TOCTOU in sof_ipc4_bytes_put\n\nIn sof_ipc4_bytes_put(), the copy size is derived from the old\ndata-\u003esize in the buffer rather than the incoming new data\u0027s size\nfield from ucontrol. If the new data has a different size, the copy\nuses the wrong length: it may truncate valid data or copy stale bytes.\n\nFix by validating and using the incoming data\u0027s sof_abi_hdr.size from\nucontrol before copying."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached via SNDRV_CTL_IOCTL_ELEM_WRITE on /dev/snd/controlC* through snd_ctl_elem_write_user() -\u003e snd_sof_bytes_put() -\u003e sof_ipc4_bytes_put(); SOF IPC4 bytes controls are a local ALSA ioctl path, not a network-facing service.\nAC:L - An attacker reliably triggers the flaw with two self-controlled ALSA writes: first establish a small cached data-\u003esize, then submit a ucontrol whose sof_abi_hdr.size differs; no race against unrelated victim state is required.\nPR:L - Only a local user who can open ALSA control devices on SOF-equipped Intel laptop/desktop audio hardware is required; typical desktop users in the audio group have this access without real root or init-namespace capabilities.\nUI:N - No separate victim action is needed; the attacker issues the control-element write ioctls directly to drive the vulnerable copy and subsequent IPC transmission.\nS:U - Impact is confined to the host kernel SOF/ALSA audio subsystem on the same machine; heap disclosure, IPC misuse, or firmware parameter corruption does not cross VM, container, or IOMMU boundaries.\nC:H - Validating and copying against stale data-\u003esize lets attacker-controlled new_hdr-\u003esize bypass bounds checks, so sof_ipc4_set_get_bytes_data() and IPC helpers read beyond the kmalloc control buffer, disclosing adjacent kernel heap memory.\nI:H - The mismatched copy leaves attacker-influenced stale kernel bytes in control buffers and forwards unvalidated sizes to firmware IPC (including sof_ipc4_set_bytes_control_data() memcpy paths), enabling bounded but attacker-directed kernel memory corruption.\nA:H - Inflated unvalidated data-\u003esize values drive large memcpy/IPC loops past the allocated control payload, which can provoke KASAN faults, unhandled page faults, kernel oops, or panic on SOF systems."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:42:37.543Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/266f936db83aee6ca6473bbb06259bda52bf4fc3"
        },
        {
          "url": "https://git.kernel.org/stable/c/4cf6a7ebbf8787393b158b2cc341723e5bebc4a8"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb4293173db2d474d8fbc0e5ecf4943e6df2b40e"
        },
        {
          "url": "https://git.kernel.org/stable/c/038406abde0d0883419ec89425ea941ec8bbef95"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ad673e7139cf214afd24321a829aad6575f4163"
        }
      ],
      "title": "ASoC: SOF: ipc4-control: Fix TOCTOU in sof_ipc4_bytes_put",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72304",
    "datePublished": "2026-08-15T05:55:22.290Z",
    "dateReserved": "2026-08-09T03:40:39.918Z",
    "dateUpdated": "2026-08-17T05:42:37.543Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}