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CVE-2026-46049

5.5 · MEDIUM

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 t…

Published May 27, 2026EPSS 0.16%

Overview

CVE-2026-46049 is a medium-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1Refgit.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559dRefgit.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8Refgit.kernel.org/stable/c/615b7a5e5d8be68d52f262579906f7e015ba4606Refgit.kernel.org/stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364Refgit.kernel.org/stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00dRefgit.kernel.org/stable/c/d0b53842211f73a10ea174100a213f7fa14b9f33Refgit.kernel.org/stable/c/dfc00979ff00d9dfdfa1df32144a272ee2728102

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46049?

CVE-2026-46049 is a medium-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-46049?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-46049?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-46049?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46049 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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