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


- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Fix available:** Yes
- **Published:** 24 Jun 2026
- **Updated:** 24 Jun 2026
- **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

## 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: 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](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-52964 and fix it if it is affected.

What it is: CVE-2026-52964 is a medium-severity vulnerability in Linux kernel, published on 24 Jun 2026. 
Exploitation: There is no known exploitation of CVE-2026-52964 in the wild and no public exploit code.

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-52964/ (Markdown: https://insights.sbomify.com/CVE-2026-52964/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-52964
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-52964
- OSV: https://osv.dev/vulnerability/CVE-2026-52964

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-52964/
Summaries are generated and may contain mistakes; the official description above is the record.