UBUNTU-CVE-2026-97206

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Source

https://ubuntu.com/security/CVE-2026-97206

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97206.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-97206

Upstream

CVE-2026-97206

Published

2026-10-21T09:17:00Z

Modified

2026-10-28T20:17:27Z

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
Ubuntu - medium

Summary

[none]

Details

NLnet Labs Unbound, 1.22.0 up to and including version 1.26.1, contains a DNS-over-QUIC (DoQ) lifetime bug reachable by a remote DoQ client under multi-threaded operation. A client-triggered QUIC path migration can enter stream/connection cleanup while a mesh reply still retains a pointer to the DoQ stream. Cleanup frees the DoQ stream and when the pending mesh reply later completes it dereferences a stale pointer leading to a crash.

References

Affected packages

Ubuntu:22.04:LTS

unbound

Package

Name: unbound
Purl: pkg:deb/ubuntu/unbound?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.13.1-1ubuntu1

1.13.1-1ubuntu3

1.13.1-1ubuntu5

1.13.1-1ubuntu5.1

1.13.1-1ubuntu5.2

1.13.1-1ubuntu5.3

1.13.1-1ubuntu5.4

1.13.1-1ubuntu5.5

1.13.1-1ubuntu5.7

1.13.1-1ubuntu5.8

1.13.1-1ubuntu5.10

1.13.1-1ubuntu5.11

1.13.1-1ubuntu5.12

1.13.1-1ubuntu5.13

1.13.1-1ubuntu5.14

1.13.1-1ubuntu5.15

1.13.1-1ubuntu5.16

1.13.1-1ubuntu5.17

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libunbound8",
            "binary_version":  "1.13.1-1ubuntu5.17"
        },
        {
            "binary_name":  "python3-unbound",
            "binary_version":  "1.13.1-1ubuntu5.17"
        },
        {
            "binary_name":  "unbound",
            "binary_version":  "1.13.1-1ubuntu5.17"
        },
        {
            "binary_name":  "unbound-anchor",
            "binary_version":  "1.13.1-1ubuntu5.17"
        },
        {
            "binary_name":  "unbound-host",
            "binary_version":  "1.13.1-1ubuntu5.17"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97206.json"

Ubuntu:24.04:LTS

unbound

Package

Name: unbound
Purl: pkg:deb/ubuntu/unbound?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.17.1-2

1.18.0-2ubuntu1

1.18.0-2ubuntu2

1.19.1-1ubuntu1

1.19.2-1ubuntu1

1.19.2-1ubuntu3

1.19.2-1ubuntu3.1

1.19.2-1ubuntu3.2

1.19.2-1ubuntu3.3

1.19.2-1ubuntu3.4

1.19.2-1ubuntu3.5

1.19.2-1ubuntu3.6

1.19.2-1ubuntu3.7

1.19.2-1ubuntu3.8

1.19.2-1ubuntu3.9

1.19.2-1ubuntu3.10

1.19.2-1ubuntu3.12

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libunbound8",
            "binary_version":  "1.19.2-1ubuntu3.12"
        },
        {
            "binary_name":  "python3-unbound",
            "binary_version":  "1.19.2-1ubuntu3.12"
        },
        {
            "binary_name":  "unbound",
            "binary_version":  "1.19.2-1ubuntu3.12"
        },
        {
            "binary_name":  "unbound-anchor",
            "binary_version":  "1.19.2-1ubuntu3.12"
        },
        {
            "binary_name":  "unbound-host",
            "binary_version":  "1.19.2-1ubuntu3.12"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97206.json"

Ubuntu:26.04:LTS

unbound

Package

Name: unbound
Purl: pkg:deb/ubuntu/unbound?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.22.0-2ubuntu2

1.22.0-2ubuntu4

1.24.2-1ubuntu1

1.24.2-1ubuntu2

1.24.2-1ubuntu2.1

1.24.2-1ubuntu2.2

1.24.2-1ubuntu2.3

1.24.2-1ubuntu2.4

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libunbound8",
            "binary_version":  "1.24.2-1ubuntu2.4"
        },
        {
            "binary_name":  "python3-unbound",
            "binary_version":  "1.24.2-1ubuntu2.4"
        },
        {
            "binary_name":  "unbound",
            "binary_version":  "1.24.2-1ubuntu2.4"
        },
        {
            "binary_name":  "unbound-anchor",
            "binary_version":  "1.24.2-1ubuntu2.4"
        },
        {
            "binary_name":  "unbound-host",
            "binary_version":  "1.24.2-1ubuntu2.4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97206.json"

Ubuntu:26.10

unbound

Package

Name: unbound
Purl: pkg:deb/ubuntu/unbound?arch=source&distro=stonking

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.24.2-1ubuntu2

1.25.1-1ubuntu1

1.25.1-1ubuntu3

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libunbound8",
            "binary_version":  "1.25.1-1ubuntu3"
        },
        {
            "binary_name":  "python3-unbound",
            "binary_version":  "1.25.1-1ubuntu3"
        },
        {
            "binary_name":  "unbound",
            "binary_version":  "1.25.1-1ubuntu3"
        },
        {
            "binary_name":  "unbound-anchor",
            "binary_version":  "1.25.1-1ubuntu3"
        },
        {
            "binary_name":  "unbound-host",
            "binary_version":  "1.25.1-1ubuntu3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97206.json"

Ubuntu:Pro:14.04:LTS

unbound

Package

Name: unbound
Purl: pkg:deb/ubuntu/unbound?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.4.20-1

1.4.21-1

1.4.21-1ubuntu1

1.4.21-1ubuntu2

1.4.22-1ubuntu1

1.4.22-1ubuntu2

1.4.22-1ubuntu3

1.4.22-1ubuntu4

1.4.22-1ubuntu4.14.04.1

1.4.22-1ubuntu4.14.04.2

1.4.22-1ubuntu4.14.04.3

1.4.22-1ubuntu4.14.04.3+esm1

1.4.22-1ubuntu4.14.04.3+esm2

1.4.22-1ubuntu4.14.04.3+esm3

1.4.22-1ubuntu4.14.04.3+esm4

1.4.22-1ubuntu4.14.04.3+esm5

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libunbound2",
            "binary_version":  "1.4.22-1ubuntu4.14.04.3+esm5"
        },
        {
            "binary_name":  "python-unbound",
            "binary_version":  "1.4.22-1ubuntu4.14.04.3+esm5"
        },
        {
            "binary_name":  "unbound",
            "binary_version":  "1.4.22-1ubuntu4.14.04.3+esm5"
        },
        {
            "binary_name":  "unbound-anchor",
            "binary_version":  "1.4.22-1ubuntu4.14.04.3+esm5"
        },
        {
            "binary_name":  "unbound-host",
            "binary_version":  "1.4.22-1ubuntu4.14.04.3+esm5"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97206.json"

Ubuntu:Pro:16.04:LTS

unbound

Package

Name: unbound
Purl: pkg:deb/ubuntu/unbound?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.4.22-1ubuntu6

1.5.7-1ubuntu1

1.5.7-1ubuntu2

1.5.8-1ubuntu1

1.5.8-1ubuntu1.1

1.5.8-1ubuntu1.1+esm1

1.5.8-1ubuntu1.1+esm2

1.5.8-1ubuntu1.1+esm3

1.5.8-1ubuntu1.1+esm4

1.5.8-1ubuntu1.1+esm5

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libunbound2",
            "binary_version":  "1.5.8-1ubuntu1.1+esm5"
        },
        {
            "binary_name":  "python-unbound",
            "binary_version":  "1.5.8-1ubuntu1.1+esm5"
        },
        {
            "binary_name":  "unbound",
            "binary_version":  "1.5.8-1ubuntu1.1+esm5"
        },
        {
            "binary_name":  "unbound-anchor",
            "binary_version":  "1.5.8-1ubuntu1.1+esm5"
        },
        {
            "binary_name":  "unbound-host",
            "binary_version":  "1.5.8-1ubuntu1.1+esm5"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97206.json"

Ubuntu:Pro:18.04:LTS

unbound

Package

Name: unbound
Purl: pkg:deb/ubuntu/unbound?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.6.5-1

1.6.7-1

1.6.7-1build1

1.6.7-1ubuntu1

1.6.7-1ubuntu2

1.6.7-1ubuntu2.1

1.6.7-1ubuntu2.2

1.6.7-1ubuntu2.3

1.6.7-1ubuntu2.4

1.6.7-1ubuntu2.5

1.6.7-1ubuntu2.6

1.6.7-1ubuntu2.6+esm2

1.6.7-1ubuntu2.6+esm3

1.6.7-1ubuntu2.6+esm4

1.6.7-1ubuntu2.6+esm5

1.6.7-1ubuntu2.6+esm6

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libunbound2",
            "binary_version":  "1.6.7-1ubuntu2.6+esm6"
        },
        {
            "binary_name":  "python-unbound",
            "binary_version":  "1.6.7-1ubuntu2.6+esm6"
        },
        {
            "binary_name":  "python3-unbound",
            "binary_version":  "1.6.7-1ubuntu2.6+esm6"
        },
        {
            "binary_name":  "unbound",
            "binary_version":  "1.6.7-1ubuntu2.6+esm6"
        },
        {
            "binary_name":  "unbound-anchor",
            "binary_version":  "1.6.7-1ubuntu2.6+esm6"
        },
        {
            "binary_name":  "unbound-host",
            "binary_version":  "1.6.7-1ubuntu2.6+esm6"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97206.json"

Ubuntu:Pro:20.04:LTS

unbound

Package

Name: unbound
Purl: pkg:deb/ubuntu/unbound?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.9.0-2ubuntu1

1.9.0-2ubuntu2

1.9.4-2

1.9.4-2ubuntu1

1.9.4-2ubuntu1.1

1.9.4-2ubuntu1.2

1.9.4-2ubuntu1.3

1.9.4-2ubuntu1.4

1.9.4-2ubuntu1.5

1.9.4-2ubuntu1.6

1.9.4-2ubuntu1.8

1.9.4-2ubuntu1.9

1.9.4-2ubuntu1.11

1.9.4-2ubuntu1.11+esm1

1.9.4-2ubuntu1.11+esm2

1.9.4-2ubuntu1.11+esm3

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libunbound8",
            "binary_version":  "1.9.4-2ubuntu1.11+esm3"
        },
        {
            "binary_name":  "python-unbound",
            "binary_version":  "1.9.4-2ubuntu1.11+esm3"
        },
        {
            "binary_name":  "python3-unbound",
            "binary_version":  "1.9.4-2ubuntu1.11+esm3"
        },
        {
            "binary_name":  "unbound",
            "binary_version":  "1.9.4-2ubuntu1.11+esm3"
        },
        {
            "binary_name":  "unbound-anchor",
            "binary_version":  "1.9.4-2ubuntu1.11+esm3"
        },
        {
            "binary_name":  "unbound-host",
            "binary_version":  "1.9.4-2ubuntu1.11+esm3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97206.json"