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 products
linux: linux kernel
References8
- git.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1 Patch
- git.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559d Patch
- git.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8 Patch
- git.kernel.org/stable/c/615b7a5e5d8be68d52f262579906f7e015ba4606 Patch
- git.kernel.org/stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364 Patch
- git.kernel.org/stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00d Patch
- git.kernel.org/stable/c/d0b53842211f73a10ea174100a213f7fa14b9f33 Patch
- git.kernel.org/stable/c/dfc00979ff00d9dfdfa1df32144a272ee2728102 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 14 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.