CVE-2026-93184 (GCVE-0-2026-93184)
Vulnerability from cvelistv5
Published
2026-09-17 16:12
Modified
2026-10-19 09:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: fsl_audmix: rework runtime PM handling in probe After pm_runtime_enable() the AUDMIX block is powered off and stays suspended until the first runtime resume. Register writes issued between probe() and the first resume (e.g. from DAPM or ALSA control paths) target unpowered hardware and cause a system hang. Fix this by calling pm_runtime_resume_and_get() immediately after pm_runtime_enable() to power the hardware up and enable its clocks. Release the reference afterwards with pm_runtime_put() to allow the runtime PM framework to suspend the device and switch the regmap to cache-only mode when idle. When CONFIG_PM is disabled or runtime PM is not enabled, pm_runtime_* calls are stubs that do not power up the hardware. Handle this case explicitly by calling fsl_audmix_runtime_resume() directly so the hardware is always initialised and its clocks are enabled, ensuring register accesses succeed regardless of PM configuration.
References
Impacted products
Vendor Product Version
Linux Linux Version: be1df61cf06efb355c90702e46b8d46f055acb4e
Version: be1df61cf06efb355c90702e46b8d46f055acb4e
Version: be1df61cf06efb355c90702e46b8d46f055acb4e
Version: be1df61cf06efb355c90702e46b8d46f055acb4e
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/fsl/fsl_audmix.c"
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          "vendor": "Linux",
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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: fsl_audmix: rework runtime PM handling in probe\n\nAfter pm_runtime_enable() the AUDMIX block is powered off and stays\nsuspended until the first runtime resume. Register writes issued between\nprobe() and the first resume (e.g. from DAPM or ALSA control paths)\ntarget unpowered hardware and cause a system hang.\n\nFix this by calling pm_runtime_resume_and_get() immediately after\npm_runtime_enable() to power the hardware up and enable its clocks.\nRelease the reference afterwards with pm_runtime_put() to allow the\nruntime PM framework to suspend the device and switch the regmap to\ncache-only mode when idle.\n\nWhen CONFIG_PM is disabled or runtime PM is not enabled, pm_runtime_*\ncalls are stubs that do not power up the hardware. Handle this case\nexplicitly by calling fsl_audmix_runtime_resume() directly so the\nhardware is always initialised and its clocks are enabled, ensuring\nregister accesses succeed regardless of PM configuration."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:06:57.098Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b5c3f8015af442c2411722cf8c220cfbae271230"
        },
        {
          "url": "https://git.kernel.org/stable/c/e921cc73fae68ccee932ad0a4fb11d637557db0e"
        },
        {
          "url": "https://git.kernel.org/stable/c/22c944e440bc9b16c4ee409943d69bb8ef575c9e"
        },
        {
          "url": "https://git.kernel.org/stable/c/3359ba93d01a23b2e4249e9e44ccfe48eb9c5d71"
        }
      ],
      "title": "ASoC: fsl_audmix: rework runtime PM handling in probe",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93184",
    "datePublished": "2026-09-17T16:12:10.782Z",
    "dateReserved": "2026-09-17T16:02:15.091Z",
    "dateUpdated": "2026-10-19T09:06:57.098Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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