CVE-2026-46049
ALSA: ctxfi: Add fallback to default RSR for S/PDIF
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.
INFO
Published Date :
May 27, 2026, 2:17 p.m.
Last Modified :
June 1, 2026, 5:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel.
- Apply the provided patch.
- Ensure RSR fallback logic is implemented.
References to Advisories, Solutions, and Tools
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CVE-2026-46049.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-46049 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-46049
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-46049 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-46049 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 01, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/615b7a5e5d8be68d52f262579906f7e015ba4606 Added Reference https://git.kernel.org/stable/c/d0b53842211f73a10ea174100a213f7fa14b9f33 Added Reference https://git.kernel.org/stable/c/dfc00979ff00d9dfdfa1df32144a272ee2728102 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 27, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1 Added Reference https://git.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559d Added Reference https://git.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8 Added Reference https://git.kernel.org/stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364 Added Reference https://git.kernel.org/stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00d