CVE-2025-21870 (GCVE-0-2025-21870)
Vulnerability from cvelistv5
Published
2025-03-27 13:38
Modified
2025-05-04 07:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers Other, non DAI copier widgets could have the same stream name (sname) as the ALH copier and in that case the copier->data is NULL, no alh_data is attached, which could lead to NULL pointer dereference. We could check for this NULL pointer in sof_ipc4_prepare_copier_module() and avoid the crash, but a similar loop in sof_ipc4_widget_setup_comp_dai() will miscalculate the ALH device count, causing broken audio. The correct fix is to harden the matching logic by making sure that the 1. widget is a DAI widget - so dai = w->private is valid 2. the dai (and thus the copier) is ALH copier
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6fd60136d256b3b948333ebdb3835f41a95ab7ef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/87c8768a96092ce75cd47fe076db5080db7ac515
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93c6c2e5801aab09ef1ef99f248f3cd323c3f152
Impacted products
Vendor Product Version
Linux Linux Version: a150345aa758492e05d2934f318ce7c2566b1cfe
Version: a150345aa758492e05d2934f318ce7c2566b1cfe
Version: a150345aa758492e05d2934f318ce7c2566b1cfe
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   Linux Linux Version: 6.0
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/sof/ipc4-topology.c"
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers\n\nOther, non DAI copier widgets could have the same  stream name (sname) as\nthe ALH copier and in that case the copier-\u003edata is NULL, no alh_data is\nattached, which could lead to NULL pointer dereference.\nWe could check for this NULL pointer in sof_ipc4_prepare_copier_module()\nand avoid the crash, but a similar loop in sof_ipc4_widget_setup_comp_dai()\nwill miscalculate the ALH device count, causing broken audio.\n\nThe correct fix is to harden the matching logic by making sure that the\n1. widget is a DAI widget - so dai = w-\u003eprivate is valid\n2. the dai (and thus the copier) is ALH copier"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:22:54.538Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
        {
          "url": "https://git.kernel.org/stable/c/6fd60136d256b3b948333ebdb3835f41a95ab7ef"
        }
      ],
      "title": "ASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21870",
    "datePublished": "2025-03-27T13:38:22.849Z",
    "dateReserved": "2024-12-29T08:45:45.781Z",
    "dateUpdated": "2025-05-04T07:22:54.538Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1",
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  }
}


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