Improper Input Validation Affecting cri-tools package, versions <0:1.21.0-2.el7


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.33% (68th percentile)

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  • Snyk IDSNYK-RHEL7-CRITOOLS-18681344
  • published12 Aug 2026
  • disclosed18 May 2021

Introduced: 18 May 2021

CVE-2021-25737  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade RHEL:7 cri-tools to version 0:1.21.0-2.el7 or higher.
This issue was patched in RHSA-2021:2437.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cri-tools package and not the cri-tools package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.

CVSS Base Scores

version 3.1