CVE-2026-52964 ALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans

What is CVE-2026-52964?

CVE-2026-52964 is a medium-severity vulnerability in Linux kernel, published on 24 Jun 2026.

Official description

In the Linux kernel, the following vulnerability has been resolved:

ALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans

The USB MIDI 2.0 endpoint parser has the same descriptor walking pattern as the legacy MIDI parser. It validates bLength against bNumGrpTrmBlock before reading baAssoGrpTrmBlkID[], but not against the remaining bytes in the endpoint-extra scan.

A malformed device can therefore make later baAssoGrpTrmBlkID[] reads consume bytes past the walked descriptor.

Reject zero-length and overlong descriptors while walking endpoint extras.

Which versions are affected by CVE-2026-52964?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-52964?

Upgrade to a fixed version.

Is CVE-2026-52964 being exploited?

There is no known exploitation of CVE-2026-52964 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-52964, DEBIAN-CVE-2026-52964, GHSA-885g-75hv-6jcq, ROOT-OS-UBUNTU-2404-CVE-2026-52964, UBUNTU-CVE-2026-52964.