DEBIAN-CVE-2021-25735

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2021-25735
Published: 06 Sept 2021, 12:15
Last modified:28 Apr 2026, 20:22

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 Sept 2021, 12:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:22
Last Modified
Vulnerability information updated

Description

A security issue was discovered in kube-apiserver that could allow node updates to bypass a Validating Admission Webhook. Clusters are only affected by this vulnerability if they run a Validating Admission Webhook for Nodes that denies admission based at least partially on the old state of the Node object. Validating Admission Webhook does not observe some previous fields.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

Affected Systems

  • debian•kubernetes

    < 1.20.5+really1.20.2-1 | < 1.20.5+really1.20.2-1 | < 1.20.5+really1.20.2-1 | < 1.20.5+really1.20.2-1

References (1)