UBUNTU-CVE-2026-116542

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Source
https://ubuntu.com/security/CVE-2026-116542
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116542.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-116542
Upstream
Published
2026-10-26T16:17:00Z
Modified
2026-10-28T20:15:58Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Netty netty-tcnative before 2.0.84.Final contains an SNI hostname spoofing vulnerability that allows remote unauthenticated clients to alter hostnames via JNI NewStringUTF decoding. Attackers can send overlong encodings like 0xC0 0x80 in the ClientHello server_name to confuse SNI-based certificate selection, access decisions, and logging.

References

Affected packages

Ubuntu:16.04:LTS
netty-tcnative

Package

Name
netty-tcnative
Purl
pkg:deb/ubuntu/netty-tcnative?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.1.33.Fork6-1
1.1.33.Fork10-2
1.1.33.Fork14-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libnetty-tcnative-java",
            "binary_version":  "1.1.33.Fork14-1"
        },
        {
            "binary_name":  "libnetty-tcnative-jni",
            "binary_version":  "1.1.33.Fork14-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116542.json"
Ubuntu:18.04:LTS
netty-tcnative

Package

Name
netty-tcnative
Purl
pkg:deb/ubuntu/netty-tcnative?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.1.33.Fork26-1
1.1.33.Fork26-1build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libnetty-tcnative-java",
            "binary_version":  "1.1.33.Fork26-1build1"
        },
        {
            "binary_name":  "libnetty-tcnative-jni",
            "binary_version":  "1.1.33.Fork26-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116542.json"
Ubuntu:20.04:LTS
netty-tcnative

Package

Name
netty-tcnative
Purl
pkg:deb/ubuntu/netty-tcnative?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.0.20-1
2.0.28-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libnetty-tcnative-java",
            "binary_version":  "2.0.28-1"
        },
        {
            "binary_name":  "libnetty-tcnative-jni",
            "binary_version":  "2.0.28-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116542.json"
Ubuntu:22.04:LTS
netty-tcnative

Package

Name
netty-tcnative
Purl
pkg:deb/ubuntu/netty-tcnative?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.0.28-1
2.0.28-1build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libnetty-tcnative-java",
            "binary_version":  "2.0.28-1build1"
        },
        {
            "binary_name":  "libnetty-tcnative-jni",
            "binary_version":  "2.0.28-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116542.json"
Ubuntu:24.04:LTS
netty-tcnative

Package

Name
netty-tcnative
Purl
pkg:deb/ubuntu/netty-tcnative?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.0.28-1build1
2.0.28-1build2
2.0.28-1build3
2.0.28-1build4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libnetty-tcnative-java",
            "binary_version":  "2.0.28-1build4"
        },
        {
            "binary_name":  "libnetty-tcnative-jni",
            "binary_version":  "2.0.28-1build4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116542.json"
Ubuntu:26.04:LTS
netty-tcnative

Package

Name
netty-tcnative
Purl
pkg:deb/ubuntu/netty-tcnative?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.0.28-1build4
2.0.28-1build5

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libnetty-tcnative-java",
            "binary_version":  "2.0.28-1build5"
        },
        {
            "binary_name":  "libnetty-tcnative-jni",
            "binary_version":  "2.0.28-1build5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116542.json"
Ubuntu:26.10
netty-tcnative

Package

Name
netty-tcnative
Purl
pkg:deb/ubuntu/netty-tcnative?arch=source&distro=stonking

Affected ranges

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

Affected versions

2.*
2.0.28-1build5
2.0.28-1build6

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libnetty-tcnative-java",
            "binary_version":  "2.0.28-1build6"
        },
        {
            "binary_name":  "libnetty-tcnative-jni",
            "binary_version":  "2.0.28-1build6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116542.json"