CVE-2026-72302 (GCVE-0-2026-72302)
Vulnerability from cvelistv5
Published
2026-08-15 05:55
Modified
2026-08-17 05:42
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc3-control: Use overflow checks in control_update size calc In sof_ipc3_control_update(), the expected_size calculation uses firmware-provided cdata->num_elems in arithmetic that could overflow on 32-bit platforms, wrapping to a small value. This would allow the cdata->rhdr.hdr.size comparison to pass with mismatched sizes, potentially leading to out-of-bounds access in snd_sof_update_control. Use check_mul_overflow() and check_add_overflow() to detect and reject overflowed size calculations.
References
Impacted products
Vendor Product Version
Linux Linux Version: 10f461d79c2d1afb22344986cc1b4631169cf25e
Version: 10f461d79c2d1afb22344986cc1b4631169cf25e
Version: 10f461d79c2d1afb22344986cc1b4631169cf25e
Version: 10f461d79c2d1afb22344986cc1b4631169cf25e
Version: 10f461d79c2d1afb22344986cc1b4631169cf25e
Version: 10f461d79c2d1afb22344986cc1b4631169cf25e
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          "programFiles": [
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              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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          "nodes": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "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-\u003enum_elems in arithmetic that could overflow\non 32-bit platforms, wrapping to a small value. This would allow the\ncdata-\u003erhdr.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."
        }
      ],
      "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"
          },
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              "value": "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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:42:34.654Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6856b3c23b0995eefad5a6142b4365ef70e1fe4a"
        },
        {
          "url": "https://git.kernel.org/stable/c/89a2309a9eec80d4c19e3aed62c4f923594d1911"
        },
        {
          "url": "https://git.kernel.org/stable/c/ffd79e77f2fbacd7a5d40ad1d4c7f3f089a8f2f3"
        },
        {
          "url": "https://git.kernel.org/stable/c/711d912b18763af62a63aa8f2419a774eb63bba4"
        },
        {
          "url": "https://git.kernel.org/stable/c/312c7d2ebe696da3f885eee77d52297664e57c53"
        },
        {
          "url": "https://git.kernel.org/stable/c/8791977d7289f6e9d2b014f60a5455f053a7bc04"
        }
      ],
      "title": "ASoC: SOF: ipc3-control: Use overflow checks in control_update size calc",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72302",
    "datePublished": "2026-08-15T05:55:21.049Z",
    "dateReserved": "2026-08-09T03:40:39.918Z",
    "dateUpdated": "2026-08-17T05:42:34.654Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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