{"id":"CVE-2026-46049","title":"ALSA: ctxfi: Add fallback to default RSR for S/PDIF","summary":"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->pll_rate as the RSR\nfor the MSR calculation loop. However, pll_ra…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8cc72361481f00253f1e468ade5795427386d593 < d0b53842211f73a10ea174100a213f7fa14b9f33","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 615b7a5e5d8be68d52f262579906f7e015ba4606","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < dfc00979ff00d9dfdfa1df32144a272ee2728102","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 25ded535ee261161bcf19dafd525c542e606559d","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 30f9494c6f2b53a78822cfb653ffbb1d092d44c8","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 09496158f6ebba8830593f8972035c02f97124c1","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 95b1ee8442cabbde83b2848e7c6100df90f3a00d","Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 7d61662197ecdc458e33e475b6ada7f6da61d364","Linux 2.6.31"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:06:26.866490Z"},"published":"2026-05-27","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:13:34.308Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46049","references":[{"url":"https://git.kernel.org/stable/c/d0b53842211f73a10ea174100a213f7fa14b9f33"},{"url":"https://git.kernel.org/stable/c/615b7a5e5d8be68d52f262579906f7e015ba4606"},{"url":"https://git.kernel.org/stable/c/dfc00979ff00d9dfdfa1df32144a272ee2728102"},{"url":"https://git.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559d"},{"url":"https://git.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8"},{"url":"https://git.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1"},{"url":"https://git.kernel.org/stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00d"},{"url":"https://git.kernel.org/stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02028,"ingestedAt":"2026-11-06T16:57:43.346Z","slug":"CVE-2026-46049","body":"## Overview\n\nIn 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->pll_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->rsr when atc->pll_rate is 0. This reflects\nthe hardware state, since hw_card_init() already configures the PLL\nto the default RSR.\n\n## Affected\n\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < d0b53842211f73a10ea174100a213f7fa14b9f33`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 615b7a5e5d8be68d52f262579906f7e015ba4606`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < dfc00979ff00d9dfdfa1df32144a272ee2728102`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 25ded535ee261161bcf19dafd525c542e606559d`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 30f9494c6f2b53a78822cfb653ffbb1d092d44c8`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 09496158f6ebba8830593f8972035c02f97124c1`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 95b1ee8442cabbde83b2848e7c6100df90f3a00d`\n- `Linux >= 8cc72361481f00253f1e468ade5795427386d593 < 7d61662197ecdc458e33e475b6ada7f6da61d364`\n- `Linux 2.6.31`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}