CVE-2026-46049
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 versions
Linux kernel versions
2.6.31
and later are affected. Fixed in
5.10.258,
5.15.209,
6.1.175,
6.6.140,
6.12.86,
6.18.27,
7.0.4,
7.1-rc1
and their respective stable series.
References
The following references provide additional information about CVE-2026-46049 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1
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PatchKernel patch commithttps://git.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559d
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PatchKernel patch commithttps://git.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8
Frequently asked questions
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What is CVE-2026-46049?
CVE-2026-46049 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.31 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-46049 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-46049?
Yes — CVE-2026-46049 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 2.6.31 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-46049 actively exploited?
No — CVE-2026-46049 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.