SB2026070966 - openEuler 20.03 LTS SP4 update for coredns

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Main Vulnerability Database SB2026070966

SB2026070966 - openEuler 20.03 LTS SP4 update for coredns

Published: July 9, 2026

Security Bulletin ID SB2026070966
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2026-26017)

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N]


The vulnerability allows a remote user to bypass implemented security restrictions.

The vulnerability exists due to a race condition in the default execution order of plugins. A remote user can bypass implemented ACL restrictions and gain unauthorized access to protected systems. in multi-tenant Kubernetes clusters it is possible to bypass DNS-based segmentation and perform unauthorized service discovery and reconnaissance of restricted internal infrastructure.


Remediation

Install update from vendor's website.

References