UBUNTU-CVE-2026-66374

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Source
https://ubuntu.com/security/CVE-2026-66374
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66374.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-66374
Upstream
  • CVE-2026-66374
Published
2026-07-25T01:16:00Z
Modified
2026-07-29T08:01:44Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Knot Resolver before 6.4.1 allows remote code execution via a heap-based buffer overflow in the DoQ (DNS-over-QUIC) receive path.

References

Affected packages

Ubuntu:20.04:LTS
knot-resolver

Package

Name
knot-resolver
Purl
pkg:deb/ubuntu/knot-resolver?arch=source&distro=focal

Affected ranges

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

Affected versions

3.*
3.2.1-3
3.2.1-3ubuntu1
3.2.1-3ubuntu2
3.2.1-3ubuntu2.1
3.2.1-3ubuntu2.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "knot-resolver",
            "binary_version": "3.2.1-3ubuntu2.2"
        },
        {
            "binary_name": "knot-resolver-module-http",
            "binary_version": "3.2.1-3ubuntu2.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66374.json"
Ubuntu:24.04:LTS
knot-resolver

Package

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

Affected ranges

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

Affected versions

5.*
5.6.0-1.1
5.7.0-1build1
5.7.1-1
5.7.2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "knot-resolver",
            "binary_version": "5.7.2-1"
        },
        {
            "binary_name": "knot-resolver-module-http",
            "binary_version": "5.7.2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66374.json"
Ubuntu:26.04:LTS
knot-resolver

Package

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

Affected ranges

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

Affected versions

5.*
5.7.5-1
6.*
6.0.15-4build1
6.0.17-1
6.2.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "knot-resolver6",
            "binary_version": "6.2.0-2"
        },
        {
            "binary_name": "knot-resolver6-module-dnstap",
            "binary_version": "6.2.0-2"
        },
        {
            "binary_name": "knot-resolver6-module-http",
            "binary_version": "6.2.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66374.json"
Ubuntu:Pro:16.04:LTS
knot-resolver

Package

Name
knot-resolver
Purl
pkg:deb/ubuntu/knot-resolver?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

1.*
1.0.0~beta2-123-g6134920-1
1.0.0~beta3-1
1.0.0~beta3-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "knot-resolver",
            "binary_version": "1.0.0~beta3-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66374.json"
Ubuntu:Pro:18.04:LTS
knot-resolver

Package

Name
knot-resolver
Purl
pkg:deb/ubuntu/knot-resolver?arch=source&distro=esm-apps%2Fbionic

Affected ranges

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

Affected versions

1.*
1.3.3-1
1.5.0-4
1.5.1-1
1.5.2-1
2.*
2.0.0-3
2.1.0-1
2.1.0-2
2.1.1-1
2.1.1-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "knot-resolver",
            "binary_version": "2.1.1-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "knot-resolver-module-http",
            "binary_version": "2.1.1-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "libkres6",
            "binary_version": "2.1.1-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66374.json"
Ubuntu:Pro:22.04:LTS
knot-resolver

Package

Name
knot-resolver
Purl
pkg:deb/ubuntu/knot-resolver?arch=source&distro=esm-apps%2Fjammy

Affected ranges

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

Affected versions

5.*
5.3.1-1
5.4.2-1
5.4.3-1
5.4.4-1
5.4.4-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "knot-resolver",
            "binary_version": "5.4.4-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "knot-resolver-module-http",
            "binary_version": "5.4.4-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66374.json"