{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-72302",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-72302"
  ],
  "published": "2026-08-15T06:04:33Z",
  "summary": "ASoC: SOF: ipc3-control: Use overflow checks in control_update size calc",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Use overflow checks in control_update size calc\n\nIn sof_ipc3_control_update(), the expected_size calculation uses\nfirmware-provided cdata->num_elems in arithmetic that could overflow\non 32-bit platforms, wrapping to a small value. This would allow the\ncdata->rhdr.hdr.size comparison to pass with mismatched sizes,\npotentially leading to out-of-bounds access in snd_sof_update_control.\n\nUse check_mul_overflow() and check_add_overflow() to detect and reject\noverflowed size calculations.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.178",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-72302"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6856b3c23b0995eefad5a6142b4365ef70e1fe4a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/89a2309a9eec80d4c19e3aed62c4f923594d1911"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ffd79e77f2fbacd7a5d40ad1d4c7f3f089a8f2f3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/711d912b18763af62a63aa8f2419a774eb63bba4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/312c7d2ebe696da3f885eee77d52297664e57c53"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8791977d7289f6e9d2b014f60a5455f053a7bc04"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:50:24Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The flaw is reached when the on-chip SOF DSP delivers IPC3 GET_VALUE/GET_DATA component notifications via mailbox IRQ into sof_ipc3_control_update(); this requires local access to SOF-equipped audio hardware, not remote network delivery.\nAC:L - On affected 32-bit builds, firmware-supplied num_elems deterministically wraps expected_size so the hdr.size check passes; a local attacker can repeatedly drive DSP control notifications through ALSA without uncontrollable races or victim-specific state.\nPR:L - Only an unprivileged local user able to open ALSA control devices on SOF IPC3 hardware (typical audio-group access on laptops, Chromebooks, and 32-bit embedded tablets) is needed to exercise DSP control paths that deliver the malformed IPC payloads.\nUI:N - No separate victim interaction is required; the attacker triggers SOF control-update handling through their own ALSA audio/control activity and the kernel processes the malformed IPC notification automatically.\nS:U - Heap corruption and control-cache overread/overwrite remain within the host kernel audio driver on the same machine and do not cross VM, container, or IOMMU boundaries into another security authority.\nC:H - Bypassed size validation lets snd_sof_update_control() read chanv/binary data past the kmalloc IPC buffer via loops or memcpy, yielding out-of-bounds kernel heap reads that can disclose adjacent memory contents.\nI:H - Crafted num_elems drives out-of-bounds copying from the IPC message into control caches, corrupting kernel heap objects and enabling attacker-influenced writes exploitable for further privilege escalation.\nA:H - Out-of-bounds accesses during IRQ-threaded IPC3 control-update handling can cause KASAN faults, unhandled page faults, kernel oops, or panic under realistic SOF audio workloads on 32-bit systems."
    }
  }
}