FKIE_CVE-2026-46049

Vulnerability from fkie_nvd - Published: 2026-05-27 14:17 - Updated: 2026-05-27 14:48
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: ctxfi: Add fallback to default RSR for S/PDIF spdif_passthru_playback_get_resources() uses atc->pll_rate as the RSR for the MSR calculation loop. However, pll_rate is only updated in atc_pll_init() and not in hw_pll_init(), so it remains 0 after the card init. When spdif_passthru_playback_setup() skips atc_pll_init() for 32000 Hz, (rsr * desc.msr) always becomes 0, causing the loop to spin indefinitely. Add fallback to use atc->rsr when atc->pll_rate is 0. This reflects the hardware state, since hw_card_init() already configures the PLL to the default RSR.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00d
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ctxfi: Add fallback to default RSR for S/PDIF\n\nspdif_passthru_playback_get_resources() uses atc-\u003epll_rate as the RSR\nfor the MSR calculation loop. However, pll_rate is only updated in\natc_pll_init() and not in hw_pll_init(), so it remains 0 after the\ncard init.\n\nWhen spdif_passthru_playback_setup() skips atc_pll_init() for\n32000 Hz, (rsr * desc.msr) always becomes 0, causing the loop to spin\nindefinitely.\n\nAdd fallback to use atc-\u003ersr when atc-\u003epll_rate is 0. This reflects\nthe hardware state, since hw_card_init() already configures the PLL\nto the default RSR."
    }
  ],
  "id": "CVE-2026-46049",
  "lastModified": "2026-05-27T14:48:03.013",
  "metrics": {},
  "published": "2026-05-27T14:17:24.433",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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