CVE-2026-46049 (GCVE-0-2026-46049)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:57 – Updated: 2026-06-14 17:50
VLAI
Title
ALSA: ctxfi: Add fallback to default RSR for S/PDIF
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.
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: 8cc72361481f00253f1e468ade5795427386d593 , < d0b53842211f73a10ea174100a213f7fa14b9f33 (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 615b7a5e5d8be68d52f262579906f7e015ba4606 (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < dfc00979ff00d9dfdfa1df32144a272ee2728102 (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 25ded535ee261161bcf19dafd525c542e606559d (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 30f9494c6f2b53a78822cfb653ffbb1d092d44c8 (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 09496158f6ebba8830593f8972035c02f97124c1 (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 95b1ee8442cabbde83b2848e7c6100df90f3a00d (git)
Affected: 8cc72361481f00253f1e468ade5795427386d593 , < 7d61662197ecdc458e33e475b6ada7f6da61d364 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Show details on NVD website

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          "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."
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    "dateReserved": "2026-05-13T15:03:33.094Z",
    "dateUpdated": "2026-06-14T17:50:38.717Z",
    "state": "PUBLISHED"
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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