CVE-2026-46049 (GCVE-0-2026-46049)
Vulnerability from cvelistv5
Published
2026-05-27 12:57
Modified
2026-06-14 17:50
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.
Impacted products
Vendor Product Version
Linux Linux Version: 8cc72361481f00253f1e468ade5795427386d593
Version: 8cc72361481f00253f1e468ade5795427386d593
Version: 8cc72361481f00253f1e468ade5795427386d593
Version: 8cc72361481f00253f1e468ade5795427386d593
Version: 8cc72361481f00253f1e468ade5795427386d593
Version: 8cc72361481f00253f1e468ade5795427386d593
Version: 8cc72361481f00253f1e468ade5795427386d593
Version: 8cc72361481f00253f1e468ade5795427386d593
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/pci/ctxfi/ctatc.c"
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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              "operator": "OR"
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      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:50:38.717Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d0b53842211f73a10ea174100a213f7fa14b9f33"
        },
        {
          "url": "https://git.kernel.org/stable/c/615b7a5e5d8be68d52f262579906f7e015ba4606"
        },
        {
          "url": "https://git.kernel.org/stable/c/dfc00979ff00d9dfdfa1df32144a272ee2728102"
        },
        {
          "url": "https://git.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559d"
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        {
          "url": "https://git.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1"
        },
        {
          "url": "https://git.kernel.org/stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00d"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364"
        }
      ],
      "title": "ALSA: ctxfi: Add fallback to default RSR for S/PDIF",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46049",
    "datePublished": "2026-05-27T12:57:05.761Z",
    "dateReserved": "2026-05-13T15:03:33.094Z",
    "dateUpdated": "2026-06-14T17:50:38.717Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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