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CVE-2026-52963

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Bound MIDI endpoint descriptor scans snd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint d…

Published Jun 24, 2026EPSS 0.16%

Overview

CVE-2026-52963 is a medium-severity vulnerability. It was published on June 24, 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: usb-audio: Bound MIDI endpoint descriptor scans

snd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint

descriptor size before using baAssocJackID[], but the descriptor walker can

still return a class-specific endpoint descriptor whose bLength exceeds the

remaining bytes in the endpoint-extra scan.

That leaves later flexible-array reads bounded by bLength, but not by the

remaining bytes in the endpoint-extra scan.

Stop walking when bLength is zero or

extends past the remaining endpoint-extra scan.

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/09141583bd97f4bbd7358e29fd138fe798467cdbRefgit.kernel.org/stable/c/3d3b2b01a3e73828e201ece96f863e7a3e0cdc6eRefgit.kernel.org/stable/c/728ab0c72e49ca27185067984cd565425eb69b2eRefgit.kernel.org/stable/c/a0226560540c16717efcceaf15c862cf115b01d3Refgit.kernel.org/stable/c/c59159ce10e75b568cd0d4b29efcb0fb0ddecc94Refgit.kernel.org/stable/c/c65b137d351e21cbc5630e73ef0eb1e1d75f5b20Refgit.kernel.org/stable/c/d6854daa67be623860f4e1873fd3d3c275aba4edRefgit.kernel.org/stable/c/e2f1260a056eb3215c13c48c5378f3e4112dc3af

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52963?

CVE-2026-52963 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-52963?

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-2026-52963?

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-2026-52963?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52963 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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