CVE-2026-46049
ALSA: ctxfi: Add fallback to default RSR for S/PDIF
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Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559d
- https://git.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8
- https://git.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1
- https://git.kernel.org/stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00d
- https://git.kernel.org/stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364
References (8)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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