CVE-2025-4437

medium

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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=2375084

https://access.redhat.com/security/cve/CVE-2025-4437

Details

Source: Mitre, NVD

Published: 2025-08-20

Updated: 2025-08-20

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.7

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.00034