UBUNTU-CVE-2026-33259

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Source

https://ubuntu.com/security/CVE-2026-33259

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33259.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-33259

Upstream

CVE-2026-33259

Published

2026-04-22T10:16:00Z

Modified

2026-05-20T16:25:28.070018935Z

Severity

5.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.

References

Affected packages

Ubuntu:24.04:LTS

pdns-recursor

Package

Name: pdns-recursor
Purl: pkg:deb/ubuntu/pdns-recursor?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.9.0-2

4.9.1-4

4.9.2-1

4.9.2-1build1

4.9.2-2

4.9.3-1

4.9.3-1build2

4.9.3-1build3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "pdns-recursor",
            "binary_version": "4.9.3-1build3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33259.json"

Ubuntu:25.10

pdns-recursor

Package

Name: pdns-recursor
Purl: pkg:deb/ubuntu/pdns-recursor?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.2.0-5

5.2.2-1

5.2.2-2

5.2.4-2

5.2.4-2build2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "pdns-recursor",
            "binary_version": "5.2.4-2build2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33259.json"

Ubuntu:26.04:LTS

pdns-recursor

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.2.4-2build2

5.3.1-1

5.3.3-1

5.3.4-1

5.3.4-1build1

5.3.4-2

5.3.5-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "pdns-recursor",
            "binary_version": "5.3.5-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33259.json"

Ubuntu:Pro:16.04:LTS

pdns-recursor

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.7.3-1

4.*

4.0.0~alpha1-1

4.0.0~alpha1-2

4.0.0~alpha2-2

4.0.0~alpha2-2ubuntu0.1

4.0.0~alpha2-2ubuntu0.1+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "pdns-recursor",
            "binary_version": "4.0.0~alpha2-2ubuntu0.1+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33259.json"

Ubuntu:Pro:18.04:LTS

pdns-recursor

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.0.6-1

4.0.6-1build1

4.0.7-1

4.1.1-1

4.1.1-1build1

4.1.1-2

4.1.1-2ubuntu0.1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "pdns-recursor",
            "binary_version": "4.1.1-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33259.json"

Ubuntu:Pro:20.04:LTS

pdns-recursor

Package

Name: pdns-recursor
Purl: pkg:deb/ubuntu/pdns-recursor?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.2.0-6

4.2.1-1

4.2.1-1build1

4.2.1-1build2

4.2.1-1ubuntu0.1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "pdns-recursor",
            "binary_version": "4.2.1-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33259.json"

Ubuntu:Pro:22.04:LTS

pdns-recursor

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.4.2-3

4.6.0-1ubuntu1

4.6.0-1ubuntu1+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "pdns-recursor",
            "binary_version": "4.6.0-1ubuntu1+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33259.json"