CVE-2026-46049

ALSA: ctxfi: Add fallback to default RSR for S/PDIF

State: Published
Severity: Not scored
Published: May 27, 2026
Updated: Jun 14, 2026
Reserved: May 13, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	8cc72361481f00253f1e468ade5795427386d593 to before d0b53842211f73a10ea174100a213f7fa14b9f33Affected 8cc72361481f00253f1e468ade5795427386d593 to before 615b7a5e5d8be68d52f262579906f7e015ba4606Affected 8cc72361481f00253f1e468ade5795427386d593 to before dfc00979ff00d9dfdfa1df32144a272ee2728102Affected 8cc72361481f00253f1e468ade5795427386d593 to before 25ded535ee261161bcf19dafd525c542e606559dAffected 8cc72361481f00253f1e468ade5795427386d593 to before 30f9494c6f2b53a78822cfb653ffbb1d092d44c8Affected 8cc72361481f00253f1e468ade5795427386d593 to before 09496158f6ebba8830593f8972035c02f97124c1Affected 8cc72361481f00253f1e468ade5795427386d593 to before 95b1ee8442cabbde83b2848e7c6100df90f3a00dAffected 8cc72361481f00253f1e468ade5795427386d593 to before 7d61662197ecdc458e33e475b6ada7f6da61d364Affected
LinuxLinux	2.6.31Affected before 2.6.31Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.140 through 6.6.Not affected 6.12.86 through 6.12.Not affected 6.18.27 through 6.18.Not affected 7.0.4 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

8cc72361481f00253f1e468ade5795427386d593 to before d0b53842211f73a10ea174100a213f7fa14b9f33Affected
8cc72361481f00253f1e468ade5795427386d593 to before 615b7a5e5d8be68d52f262579906f7e015ba4606Affected
8cc72361481f00253f1e468ade5795427386d593 to before dfc00979ff00d9dfdfa1df32144a272ee2728102Affected
8cc72361481f00253f1e468ade5795427386d593 to before 25ded535ee261161bcf19dafd525c542e606559dAffected
8cc72361481f00253f1e468ade5795427386d593 to before 30f9494c6f2b53a78822cfb653ffbb1d092d44c8Affected
8cc72361481f00253f1e468ade5795427386d593 to before 09496158f6ebba8830593f8972035c02f97124c1Affected
8cc72361481f00253f1e468ade5795427386d593 to before 95b1ee8442cabbde83b2848e7c6100df90f3a00dAffected
8cc72361481f00253f1e468ade5795427386d593 to before 7d61662197ecdc458e33e475b6ada7f6da61d364Affected

LinuxLinux

2.6.31Affected
before 2.6.31Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.140 through 6.6.*Not affected
6.12.86 through 6.12.*Not affected
6.18.27 through 6.18.*Not affected
7.0.4 through 7.0.*Not affected
7.1 and laterNot affected

References

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