In short
- CVE-2025-4437 is a MEDIUM (CVSS 5.7) vulnerability affecting github.com/cri-o/cri-o.
- Chance of exploitation in the next 30 days (EPSS): 0.25%, higher than 16.2% of all vulnerabilities.
- No patched version is listed yet: follow the vendor's advisory in References.
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.
NVD 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.
More vulnerabilities in github.com/cri-o/cri-o
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