CVE intelligence

CVE-2026-52963

Vulnerability intelligence

Published Jun 24, 2026Sources checked Nov 12, 2026

5.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-52963 and is rated Medium severity with a CVSS score of 5.5. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Jul 9, 2026

CBL-Mariner Releases

Vendor-listed releases

6.6.143.1-1

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-52963?

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.

Source: NVD