CVE-2025-21870 (GCVE-0-2025-21870)

Vulnerability from cvelistv5 – Published: 2025-03-27 13:38 – Updated: 2025-05-04 07:22
VLAI?
Title
ASoC: SOF: ipc4-topology: Harden loops for looking up ALH copiers
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a150345aa758492e05d2934f318ce7c2566b1cfe , < 87c8768a96092ce75cd47fe076db5080db7ac515 (git)
Affected: a150345aa758492e05d2934f318ce7c2566b1cfe , < 93c6c2e5801aab09ef1ef99f248f3cd323c3f152 (git)
Affected: a150345aa758492e05d2934f318ce7c2566b1cfe , < 6fd60136d256b3b948333ebdb3835f41a95ab7ef (git)
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    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.12.17 , ≤ 6.12.* (semver)
Unaffected: 6.13.5 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
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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/93c6c2e5801aab09ef1ef99f248f3cd323c3f152"
        },
        {
          "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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