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CVE-2026-46090

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Fix peer runtime UAF during format-change stop loopback_check_format() may stop the capture side when playback sta…

Published May 27, 2026CWE-416EPSS 0.10%

Overview

CVE-2026-46090 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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: aloop: Fix peer runtime UAF during format-change stop

loopback_check_format() may stop the capture side when playback starts

with parameters that no longer match a running capture stream. Commit

826af7fa62e3 ("ALSA: aloop: Fix racy access at PCM trigger") moved

the peer lookup under cable->lock, but the actual snd_pcm_stop() still

runs after dropping that lock.

A concurrent close can clear the capture entry from cable->streams[] and

detach or free its runtime while the playback trigger path still holds a

stale peer substream pointer.

Keep a per-cable count of in-flight peer stops before dropping

cable->lock, and make free_cable() wait for those stops before

detaching the runtime. This preserves the existing behavior while

making the peer runtime lifetime explicit.

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/03f52a9c170431e8f10e156b9dc0dae80b3e9198Refgit.kernel.org/stable/c/345c24b2bcf0923dfae1ab41497351c68214ff76Refgit.kernel.org/stable/c/5d45e34bf001344e2966dabca1897561bbc9e913Refgit.kernel.org/stable/c/83bd62fa9620ac98d5d694bde14c50f98c8e7189Refgit.kernel.org/stable/c/bdd9503c3d222d2735b56c7a8b4422ccf3de6e5cRefgit.kernel.org/stable/c/e5c33cdc6f402eab8abd36ecf436b22c9d3a8affRefaccess.redhat.com/errata/RHSA-2026:27353Refaccess.redhat.com/errata/RHSA-2026:27354Refaccess.redhat.com/errata/RHSA-2026:30848Refaccess.redhat.com/errata/RHSA-2026:33215

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46090?

CVE-2026-46090 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-46090?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-46090?

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-2026-46090?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46090 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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