UBUNTU-CVE-2026-88647

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Source
https://ubuntu.com/security/CVE-2026-88647
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88647.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-88647
Upstream
  • CVE-2026-88647
Published
2026-10-08T17:17:00Z
Modified
2026-11-05T11:47:36Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

GnuTLS v3.8.13 can perhaps unexpectedly trust a certificate on the basis of Common Name when Subject Alternative Name has an SRV otherName (1.3.6.1.5.5.7.8.7) whose value is an OCTET STRING. NOTE: the Supplier does not consider this an actionable security vulnerability because of its "threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)" policy.

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
0 Unknown introduced version / All previous versions are affected

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
3.7.3-4ubuntu1.9

Ecosystem specific 

{
    "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-2026-88647.json"
Ubuntu:24.04:LTS
gnutls28

Package

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

Affected ranges

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

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
3.8.3-1.1ubuntu3.6

Ecosystem specific 

{
    "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-2026-88647.json"
Ubuntu:26.04:LTS
gnutls28

Package

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

Affected ranges

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

Affected versions

3.*
3.8.9-3ubuntu2
3.8.10-3ubuntu1
3.8.12-2ubuntu1
3.8.12-2ubuntu1.1

Ecosystem specific 

{
    "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-2026-88647.json"
Ubuntu:26.10
gnutls28

Package

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

Affected ranges

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

Affected versions

3.*
3.8.12-2ubuntu1
3.8.12-2ubuntu1.1
3.8.13-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.8.13-1ubuntu1"
        },
        {
            "binary_name": "libgnutls-dane0t64",
            "binary_version": "3.8.13-1ubuntu1"
        },
        {
            "binary_name": "libgnutls30t64",
            "binary_version": "3.8.13-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88647.json"
Ubuntu:Pro:14.04:LTS
gnutls26

Package

Name
gnutls26
Purl
pkg:deb/ubuntu/gnutls26?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

2.*
2.12.23-1ubuntu4
2.12.23-1ubuntu5
2.12.23-12ubuntu1
2.12.23-12ubuntu2
2.12.23-12ubuntu2.1
2.12.23-12ubuntu2.2
2.12.23-12ubuntu2.3
2.12.23-12ubuntu2.4
2.12.23-12ubuntu2.5
2.12.23-12ubuntu2.6
2.12.23-12ubuntu2.7
2.12.23-12ubuntu2.8
2.12.23-12ubuntu2.10+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.0.11+really2.12.23-12ubuntu2.10+esm1"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "2.12.23-12ubuntu2.10+esm1"
        },
        {
            "binary_name": "libgnutls26",
            "binary_version": "2.12.23-12ubuntu2.10+esm1"
        },
        {
            "binary_name": "libgnutlsxx27",
            "binary_version": "2.12.23-12ubuntu2.10+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88647.json"
Ubuntu:Pro:16.04:LTS
gnutls28

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown 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
3.4.10-4ubuntu1.9+esm3
3.4.10-4ubuntu1.9+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.4.10-4ubuntu1.9+esm4"
        },
        {
            "binary_name": "guile-gnutls",
            "binary_version": "3.4.10-4ubuntu1.9+esm4"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.4.10-4ubuntu1.9+esm4"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.4.10-4ubuntu1.9+esm4"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.4.10-4ubuntu1.9+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88647.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
0 Unknown 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
3.5.18-1ubuntu1.6+esm3
3.5.18-1ubuntu1.6+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.5.18-1ubuntu1.6+esm4"
        },
        {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.5.18-1ubuntu1.6+esm4"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.5.18-1ubuntu1.6+esm4"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.5.18-1ubuntu1.6+esm4"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.5.18-1ubuntu1.6+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88647.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
0 Unknown 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
3.6.13-2ubuntu1.12+esm2
3.6.13-2ubuntu1.12+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.6.13-2ubuntu1.12+esm3"
        },
        {
            "binary_name": "guile-gnutls",
            "binary_version": "3.6.13-2ubuntu1.12+esm3"
        },
        {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.6.13-2ubuntu1.12+esm3"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.6.13-2ubuntu1.12+esm3"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.6.13-2ubuntu1.12+esm3"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.6.13-2ubuntu1.12+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88647.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
0 Unknown 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-2026-88647.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
0 Unknown introduced version / All previous versions are affected

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
3.7.3-4ubuntu1.9+Fips1

Ecosystem specific 

{
    "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-2026-88647.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
0 Unknown introduced version / All previous versions are affected

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
3.8.3-1.1ubuntu3.6+Fips1.2

Ecosystem specific 

{
    "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-2026-88647.json"