OESA-2026-4018

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-4018
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-4018
Upstream
CVE (3)
Published
2026-09-25T01:27:22Z
Modified
2026-09-25T01:45:03Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
coredns security update
Details

CoreDNS is a fast and flexible DNS server. The key word here is flexible: with CoreDNS you are able to do what you want with your DNS data by utilizing plugins.

Security Fix(es):

An issue was discovered in CoreDNS through 1.10.1. There is a vulnerability in DNS resolving software, which triggers a resolver to ignore valid responses, thus causing denial of service for normal resolution. In an exploit, the attacker could just forge a response targeting the source port of a vulnerable resolver without the need to guess the correct TXID.(CVE-2023-28452)

CoreDNS through 1.10.1 enables attackers to achieve DNS cache poisoning and inject fake responses via a birthday attack.(CVE-2023-30464)

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-HTTPS (DoH) GET path accepts oversized dns= query parameter values and performs URL query parsing, base64 decoding, and DNS message unpacking before rejecting the request. Unlike the POST path, which applies a bounded read via http.MaxBytesReader limited to 65536 bytes, the GET path has no equivalent size validation before expensive processing. A remote, unauthenticated attacker can repeatedly send oversized DoH GET requests to force high CPU usage, large transient memory allocations, and elevated garbage-collection pressure, leading to denial of service. This issue has been fixed in version 1.14.3.(CVE-2026-32936)

Database specific 
{
    "severity":  "High"
}
References

Affected packages

openEuler:20.03-LTS-SP4
coredns

Package

Name
coredns
Purl
pkg:rpm/openEuler/coredns&distro=openEuler-20.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.7.0-1.7.oe2003sp4

Ecosystem specific 

{
    "aarch64":  [
        "coredns-1.7.0-1.7.oe2003sp4.aarch64.rpm",
        "coredns-help-1.7.0-1.7.oe2003sp4.aarch64.rpm"
    ],
    "src":  [
        "coredns-1.7.0-1.7.oe2003sp4.src.rpm"
    ],
    "x86_64":  [
        "coredns-1.7.0-1.7.oe2003sp4.x86_64.rpm",
        "coredns-help-1.7.0-1.7.oe2003sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"
openEuler:22.03-LTS-SP4
coredns

Package

Name
coredns
Purl
pkg:rpm/openEuler/coredns&distro=openEuler-22.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.7.0-1.9.oe2203sp4

Ecosystem specific 

{
    "aarch64":  [
        "coredns-1.7.0-1.9.oe2203sp4.aarch64.rpm",
        "coredns-help-1.7.0-1.9.oe2203sp4.aarch64.rpm"
    ],
    "src":  [
        "coredns-1.7.0-1.9.oe2203sp4.src.rpm"
    ],
    "x86_64":  [
        "coredns-1.7.0-1.9.oe2203sp4.x86_64.rpm",
        "coredns-help-1.7.0-1.9.oe2203sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"
openEuler:24.03-LTS-SP1
coredns

Package

Name
coredns
Purl
pkg:rpm/openEuler/coredns&distro=openEuler-24.03-LTS-SP1

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.7.0-1.10.oe2403sp1

Ecosystem specific 

{
    "aarch64":  [
        "coredns-1.7.0-1.10.oe2403sp1.aarch64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp1.aarch64.rpm"
    ],
    "src":  [
        "coredns-1.7.0-1.10.oe2403sp1.src.rpm"
    ],
    "x86_64":  [
        "coredns-1.7.0-1.10.oe2403sp1.x86_64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp1.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"
openEuler:24.03-LTS-SP3
coredns

Package

Name
coredns
Purl
pkg:rpm/openEuler/coredns&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.7.0-1.10.oe2403sp3

Ecosystem specific 

{
    "aarch64":  [
        "coredns-1.7.0-1.10.oe2403sp3.aarch64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp3.aarch64.rpm"
    ],
    "src":  [
        "coredns-1.7.0-1.10.oe2403sp3.src.rpm"
    ],
    "x86_64":  [
        "coredns-1.7.0-1.10.oe2403sp3.x86_64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp3.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"
openEuler:24.03-LTS-SP4
coredns

Package

Name
coredns
Purl
pkg:rpm/openEuler/coredns&distro=openEuler-24.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.7.0-1.10.oe2403sp4

Ecosystem specific 

{
    "aarch64":  [
        "coredns-1.7.0-1.10.oe2403sp4.aarch64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp4.aarch64.rpm"
    ],
    "src":  [
        "coredns-1.7.0-1.10.oe2403sp4.src.rpm"
    ],
    "x86_64":  [
        "coredns-1.7.0-1.10.oe2403sp4.x86_64.rpm",
        "coredns-help-1.7.0-1.10.oe2403sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4018.json"