UBUNTU-CVE-2026-103963

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Source
https://ubuntu.com/security/CVE-2026-103963
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-103963
Upstream
  • CVE-2026-103963
Published
2026-10-30T00:00:00Z
Modified
2026-10-31T03:30:05Z
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 glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by sending excessive session ticket messages, causing the client application to continuously consume memory. This unbounded memory growth can exhaust system memory, resulting in a Denial of Service (DoS).

References

Affected packages

Ubuntu:16.04:LTS
glib-networking

Package

Name
glib-networking
Purl
pkg:deb/ubuntu/glib-networking?arch=source&distro=xenial

Affected ranges

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

Affected versions

2.*
2.46.0-1
2.46.1-1
2.46.1-1build1
2.48.0-1
2.48.2-1~ubuntu16.04.1
2.48.2-1~ubuntu16.04.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "glib-networking",
            "binary_version":  "2.48.2-1~ubuntu16.04.2"
        },
        {
            "binary_name":  "glib-networking-common",
            "binary_version":  "2.48.2-1~ubuntu16.04.2"
        },
        {
            "binary_name":  "glib-networking-services",
            "binary_version":  "2.48.2-1~ubuntu16.04.2"
        },
        {
            "binary_name":  "glib-networking-tests",
            "binary_version":  "2.48.2-1~ubuntu16.04.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"
Ubuntu:18.04:LTS
glib-networking

Package

Name
glib-networking
Purl
pkg:deb/ubuntu/glib-networking?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.54.0-1
2.54.1-1
2.54.1-2
2.55.90-1
2.56.0-1
2.56.0-1ubuntu0.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "glib-networking",
            "binary_version":  "2.56.0-1ubuntu0.1"
        },
        {
            "binary_name":  "glib-networking-common",
            "binary_version":  "2.56.0-1ubuntu0.1"
        },
        {
            "binary_name":  "glib-networking-services",
            "binary_version":  "2.56.0-1ubuntu0.1"
        },
        {
            "binary_name":  "glib-networking-tests",
            "binary_version":  "2.56.0-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"
Ubuntu:20.04:LTS
glib-networking

Package

Name
glib-networking
Purl
pkg:deb/ubuntu/glib-networking?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.62.1-1
2.63.2-1
2.63.3-0build1
2.63.90-1ubuntu1
2.63.91-1ubuntu1
2.64.0-1
2.64.1-1
2.64.2-1build1
2.64.2-1ubuntu0.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "glib-networking",
            "binary_version":  "2.64.2-1ubuntu0.1"
        },
        {
            "binary_name":  "glib-networking-common",
            "binary_version":  "2.64.2-1ubuntu0.1"
        },
        {
            "binary_name":  "glib-networking-services",
            "binary_version":  "2.64.2-1ubuntu0.1"
        },
        {
            "binary_name":  "glib-networking-tests",
            "binary_version":  "2.64.2-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"
Ubuntu:22.04:LTS
glib-networking

Package

Name
glib-networking
Purl
pkg:deb/ubuntu/glib-networking?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.68.2-2
2.70.0-1
2.70.1-1
2.72~alpha-1
2.72~beta-1build1
2.72.0-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "glib-networking",
            "binary_version":  "2.72.0-1"
        },
        {
            "binary_name":  "glib-networking-common",
            "binary_version":  "2.72.0-1"
        },
        {
            "binary_name":  "glib-networking-services",
            "binary_version":  "2.72.0-1"
        },
        {
            "binary_name":  "glib-networking-tests",
            "binary_version":  "2.72.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"
Ubuntu:24.04:LTS
glib-networking

Package

Name
glib-networking
Purl
pkg:deb/ubuntu/glib-networking?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.78.0-1
2.80~alpha-1
2.80~rc-1
2.80.0-1build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "glib-networking",
            "binary_version":  "2.80.0-1build1"
        },
        {
            "binary_name":  "glib-networking-common",
            "binary_version":  "2.80.0-1build1"
        },
        {
            "binary_name":  "glib-networking-services",
            "binary_version":  "2.80.0-1build1"
        },
        {
            "binary_name":  "glib-networking-tests",
            "binary_version":  "2.80.0-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"
Ubuntu:26.04:LTS
glib-networking

Package

Name
glib-networking
Purl
pkg:deb/ubuntu/glib-networking?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.80.1-1build1
2.80.1-1build2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "glib-networking",
            "binary_version":  "2.80.1-1build2"
        },
        {
            "binary_name":  "glib-networking-common",
            "binary_version":  "2.80.1-1build2"
        },
        {
            "binary_name":  "glib-networking-services",
            "binary_version":  "2.80.1-1build2"
        },
        {
            "binary_name":  "glib-networking-tests",
            "binary_version":  "2.80.1-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"
Ubuntu:26.10
glib-networking

Package

Name
glib-networking
Purl
pkg:deb/ubuntu/glib-networking?arch=source&distro=stonking

Affected ranges

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

Affected versions

2.*
2.80.1-1build2
2.90.0-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "glib-networking",
            "binary_version":  "2.90.0-2"
        },
        {
            "binary_name":  "glib-networking-common",
            "binary_version":  "2.90.0-2"
        },
        {
            "binary_name":  "glib-networking-services",
            "binary_version":  "2.90.0-2"
        },
        {
            "binary_name":  "glib-networking-tests",
            "binary_version":  "2.90.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103963.json"