UBUNTU-CVE-2026-42009

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Source

https://ubuntu.com/security/CVE-2026-42009

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-42009

Upstream

CVE-2026-42009

Downstream

USN-8284-1

Related

USN-8284-1

Published

2026-04-30T00:00:00Z

Modified

2026-06-02T12:00:08.420027253Z

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

A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.

References

Affected packages

Ubuntu:22.04:LTS

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.7.3-4ubuntu1.9

Affected versions

3.*

3.7.1-5ubuntu1

3.7.2-2ubuntu1

3.7.2-4ubuntu1

3.7.2-5ubuntu1

3.7.3-4ubuntu1

3.7.3-4ubuntu1.1

3.7.3-4ubuntu1.2

3.7.3-4ubuntu1.3

3.7.3-4ubuntu1.4

3.7.3-4ubuntu1.5

3.7.3-4ubuntu1.6

3.7.3-4ubuntu1.7

3.7.3-4ubuntu1.8

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.7.3-4ubuntu1.9"
        },
        {
            "binary_name": "guile-gnutls",
            "binary_version": "3.7.3-4ubuntu1.9"
        },
        {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.7.3-4ubuntu1.9"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.7.3-4ubuntu1.9"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.7.3-4ubuntu1.9"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.7.3-4ubuntu1.9"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"

Ubuntu:24.04:LTS

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.8.3-1.1ubuntu3.6

Affected versions

3.*

3.8.1-4ubuntu1

3.8.1-4ubuntu6

3.8.1-4ubuntu7

3.8.3-1ubuntu1

3.8.3-1.1ubuntu2

3.8.3-1.1ubuntu3

3.8.3-1.1ubuntu3.1

3.8.3-1.1ubuntu3.2

3.8.3-1.1ubuntu3.3

3.8.3-1.1ubuntu3.4

3.8.3-1.1ubuntu3.5

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.8.3-1.1ubuntu3.6"
        },
        {
            "binary_name": "libgnutls-dane0t64",
            "binary_version": "3.8.3-1.1ubuntu3.6"
        },
        {
            "binary_name": "libgnutls-openssl27t64",
            "binary_version": "3.8.3-1.1ubuntu3.6"
        },
        {
            "binary_name": "libgnutls30t64",
            "binary_version": "3.8.3-1.1ubuntu3.6"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"

Ubuntu:25.10

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.8.9-3ubuntu2.2

Affected versions

3.*

3.8.9-2ubuntu3

3.8.9-3ubuntu1

3.8.9-3ubuntu2

3.8.9-3ubuntu2.1

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.8.9-3ubuntu2.2"
        },
        {
            "binary_name": "libgnutls-dane0t64",
            "binary_version": "3.8.9-3ubuntu2.2"
        },
        {
            "binary_name": "libgnutls-openssl27t64",
            "binary_version": "3.8.9-3ubuntu2.2"
        },
        {
            "binary_name": "libgnutls30t64",
            "binary_version": "3.8.9-3ubuntu2.2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"

Ubuntu:26.04:LTS

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.8.12-2ubuntu1.1

Affected versions

3.*

3.8.9-3ubuntu2

3.8.10-3ubuntu1

3.8.12-2ubuntu1

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.8.12-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls-dane0t64",
            "binary_version": "3.8.12-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls-openssl27t64",
            "binary_version": "3.8.12-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls30t64",
            "binary_version": "3.8.12-2ubuntu1.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"

Ubuntu:Pro:16.04:LTS

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=esm-infra%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.3.15-5ubuntu2

3.3.18-1ubuntu1

3.3.20-1ubuntu1

3.4.9-2ubuntu1

3.4.10-4ubuntu1

3.4.10-4ubuntu1.1

3.4.10-4ubuntu1.2

3.4.10-4ubuntu1.3

3.4.10-4ubuntu1.4

3.4.10-4ubuntu1.5

3.4.10-4ubuntu1.6

3.4.10-4ubuntu1.7

3.4.10-4ubuntu1.8

3.4.10-4ubuntu1.9

3.4.10-4ubuntu1.9+esm1

3.4.10-4ubuntu1.9+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
        },
        {
            "binary_name": "guile-gnutls",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.4.10-4ubuntu1.9+esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"

Ubuntu:Pro:18.04:LTS

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.5.8-6ubuntu3

3.5.17-1ubuntu1

3.5.17-1ubuntu3

3.5.18-1ubuntu1

3.5.18-1ubuntu1.1

3.5.18-1ubuntu1.2

3.5.18-1ubuntu1.3

3.5.18-1ubuntu1.4

3.5.18-1ubuntu1.5

3.5.18-1ubuntu1.6

3.5.18-1ubuntu1.6+esm1

3.5.18-1ubuntu1.6+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
        },
        {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.5.18-1ubuntu1.6+esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"

Ubuntu:Pro:20.04:LTS

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.6.9-5ubuntu1

3.6.9-5ubuntu2

3.6.10-5

3.6.11.1-2

3.6.11.1-2ubuntu2

3.6.13-2ubuntu1

3.6.13-2ubuntu1.1

3.6.13-2ubuntu1.2

3.6.13-2ubuntu1.3

3.6.13-2ubuntu1.6

3.6.13-2ubuntu1.7

3.6.13-2ubuntu1.8

3.6.13-2ubuntu1.9

3.6.13-2ubuntu1.10

3.6.13-2ubuntu1.11

3.6.13-2ubuntu1.12

3.6.13-2ubuntu1.12+esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
        },
        {
            "binary_name": "guile-gnutls",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
        },
        {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.6.13-2ubuntu1.12+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"

Ubuntu:Pro:FIPS-preview:22.04:LTS

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=fips-preview%2Fjammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.7.3-4ubuntu1.2+Fips1.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.7.3-4ubuntu1.2+Fips1.1"
        },
        {
            "binary_name": "guile-gnutls",
            "binary_version": "3.7.3-4ubuntu1.2+Fips1.1"
        },
        {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.7.3-4ubuntu1.2+Fips1.1"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.7.3-4ubuntu1.2+Fips1.1"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.7.3-4ubuntu1.2+Fips1.1"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.7.3-4ubuntu1.2+Fips1.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"

Ubuntu:Pro:FIPS-updates:22.04:LTS

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=fips-updates%2Fjammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.7.3-4ubuntu1.9+Fips1

Affected versions

3.*

3.7.3-4ubuntu1.2+Fips1.1

3.7.3-4ubuntu1.3+Fips1.1

3.7.3-4ubuntu1.4+Fips1

3.7.3-4ubuntu1.5+Fips1

3.7.3-4ubuntu1.6+Fips1

3.7.3-4ubuntu1.7+Fips1

3.7.3-4ubuntu1.7+Fips1.1

3.7.3-4ubuntu1.8+Fips1.1

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.7.3-4ubuntu1.9+Fips1"
        },
        {
            "binary_name": "guile-gnutls",
            "binary_version": "3.7.3-4ubuntu1.9+Fips1"
        },
        {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.7.3-4ubuntu1.9+Fips1"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.7.3-4ubuntu1.9+Fips1"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.7.3-4ubuntu1.9+Fips1"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.7.3-4ubuntu1.9+Fips1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"

Ubuntu:Pro:FIPS-updates:24.04:LTS

gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28?arch=source&distro=fips-updates%2Fnoble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.8.3-1.1ubuntu3.6+Fips1.2

Affected versions

3.*

3.8.3-1.1ubuntu3.1+Fips1

3.8.3-1.1ubuntu3.4+Fips1

3.8.3-1.1ubuntu3.4+Fips1.1

3.8.3-1.1ubuntu3.5+Fips1.1

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.8.3-1.1ubuntu3.6+Fips1.2"
        },
        {
            "binary_name": "libgnutls-dane0t64",
            "binary_version": "3.8.3-1.1ubuntu3.6+Fips1.2"
        },
        {
            "binary_name": "libgnutls-openssl27t64",
            "binary_version": "3.8.3-1.1ubuntu3.6+Fips1.2"
        },
        {
            "binary_name": "libgnutls30t64",
            "binary_version": "3.8.3-1.1ubuntu3.6+Fips1.2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42009.json"