UBUNTU-CVE-2026-123602

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Source
https://ubuntu.com/security/CVE-2026-123602
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123602.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-123602
Upstream
Published
2026-11-09T00:00:00Z
Modified
2026-11-10T02:50:13Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The Hickory DNS recursor in all versions of hickory-recursor and in hickory-resolver 0.26.0-beta.1 before 0.26.2 (recursor feature) is vulnerable to ghost domain names attacks because it reuses child-side apex NS RRsets cached from zone NS queries for iterative resolution. By repeatedly querying a zone's NS records, an attacker keeps the stale RRset cached indefinitely, letting name servers whose delegation the parent revoked keep answering for the zone.

References

Affected packages

Ubuntu:24.04:LTS
rust-hickory-resolver

Package

Name
rust-hickory-resolver
Purl
pkg:deb/ubuntu/rust-hickory-resolver?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.24.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-hickory-resolver-dev",
            "binary_version": "0.24.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123602.json"
Ubuntu:26.04:LTS
rust-hickory-recursor

Package

Name
rust-hickory-recursor
Purl
pkg:deb/ubuntu/rust-hickory-recursor?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.24.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-hickory-recursor-dev",
            "binary_version": "0.24.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123602.json"
rust-hickory-resolver

Package

Name
rust-hickory-resolver
Purl
pkg:deb/ubuntu/rust-hickory-resolver?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.24.4-1
0.24.4-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-hickory-resolver-dev",
            "binary_version": "0.24.4-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123602.json"
Ubuntu:26.10
rust-hickory-recursor

Package

Name
rust-hickory-recursor
Purl
pkg:deb/ubuntu/rust-hickory-recursor?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.24.1-1
0.25.2-6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-hickory-recursor-dev",
            "binary_version": "0.25.2-6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123602.json"
rust-hickory-resolver

Package

Name
rust-hickory-resolver
Purl
pkg:deb/ubuntu/rust-hickory-resolver?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.24.4-5
0.26.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-hickory-resolver-dev",
            "binary_version": "0.26.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123602.json"