SB2026071915 - openEuler 24.03 LTS SP4 update for coredns
Published: July 19, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Allocation of resources without limits or throttling (CVE-ID: CVE-2025-68151)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources in gRPC, HTTPS, and HTTP/3 implementations. A remote attacker can initiate multiple connections with the services to trigger resource exhaustion and perform a denial of service (DoS) attack.
2) 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.
3) Resource exhaustion (CVE-ID: CVE-2025-47950)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources within the DNS-over-QUIC (DoQ) server implementation in server_quic.go. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.