# CVE-2025-4437

## Summary

- **CVE ID:** CVE-2025-4437
- **Severity:** MEDIUM
- **CVSS Score:** 5.7 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H)
- **CWE:** CWE-770
- **Published:** Aug 20, 2025
- **Last Modified:** Sep 1, 2026

## Description

There's a vulnerability in the CRI-O application where when container is launched with securityContext.runAsUser specifying a non-existent user, CRI-O attempts to create the user, reading the container's entire /etc/passwd file into memory. If this file is excessively large, it can cause the a high memory consumption leading applications to be killed due to out-of-memory. As a result a denial-of-service can be achieved, possibly disrupting other pods and services running in the same host.

## Affected Products

No affected products listed.

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2025-4437)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2375084)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.25%
- **EPSS Percentile:** 16.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._