ubuntu-cve-2026-44249
Vulnerability from osv_ubuntu
Published
2026-06-11 22:16
Modified
2026-06-30 16:21
Summary
Details
Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Severity
8.1 (High)
8.1 (High)
N/A (UNKNOWN)
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnetty-java",
"binary_version": "1:3.2.6.Final-2+deb8u2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "netty",
"purl": "pkg:deb/ubuntu/netty@1:3.2.6.Final-2+deb8u2ubuntu0.1~esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:3.2.6.Final-2",
"1:3.2.6.Final-2+deb8u2build0.14.04.1~esm1",
"1:3.2.6.Final-2+deb8u2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnetty-java",
"binary_version": "1:4.0.34-1ubuntu0.1~esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "netty",
"purl": "pkg:deb/ubuntu/netty@1:4.0.34-1ubuntu0.1~esm4?arch=source\u0026distro=esm-apps-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:3.2.6.Final-2",
"1:4.0.32-1",
"1:4.0.33-1",
"1:4.0.34-1",
"1:4.0.34-1ubuntu0.1~esm1",
"1:4.0.34-1ubuntu0.1~esm2",
"1:4.0.34-1ubuntu0.1~esm3",
"1:4.0.34-1ubuntu0.1~esm4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnetty-java",
"binary_version": "1:4.1.7-4ubuntu0.1+esm6"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "netty",
"purl": "pkg:deb/ubuntu/netty@1:4.1.7-4ubuntu0.1+esm6?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:4.1.7-4",
"1:4.1.7-4ubuntu0.1~esm1",
"1:4.1.7-4ubuntu0.1",
"1:4.1.7-4ubuntu0.1+esm1",
"1:4.1.7-4ubuntu0.1+esm2",
"1:4.1.7-4ubuntu0.1+esm3",
"1:4.1.7-4ubuntu0.1+esm4",
"1:4.1.7-4ubuntu0.1+esm5",
"1:4.1.7-4ubuntu0.1+esm6"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnetty-java",
"binary_version": "1:4.1.45-1ubuntu0.1~esm6"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "netty",
"purl": "pkg:deb/ubuntu/netty@1:4.1.45-1ubuntu0.1~esm6?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:4.1.33-1",
"1:4.1.33-2",
"1:4.1.33-3",
"1:4.1.45-1",
"1:4.1.45-1ubuntu0.1~esm1",
"1:4.1.45-1ubuntu0.1~esm2",
"1:4.1.45-1ubuntu0.1~esm3",
"1:4.1.45-1ubuntu0.1~esm4",
"1:4.1.45-1ubuntu0.1~esm6"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnetty-java",
"binary_version": "1:4.1.48-4+deb11u2ubuntu0.1+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "netty",
"purl": "pkg:deb/ubuntu/netty@1:4.1.48-4+deb11u2ubuntu0.1+esm3?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:4.1.48-4",
"1:4.1.48-4+deb11u1build0.22.04.1",
"1:4.1.48-4+deb11u2build0.22.04.1",
"1:4.1.48-4+deb11u2ubuntu0.1~esm1",
"1:4.1.48-4+deb11u2ubuntu0.1~esm2",
"1:4.1.48-4+deb11u2ubuntu0.1",
"1:4.1.48-4+deb11u2ubuntu0.1+esm1",
"1:4.1.48-4+deb11u2ubuntu0.1+esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnetty-java",
"binary_version": "1:4.1.48-9ubuntu0.1+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "netty",
"purl": "pkg:deb/ubuntu/netty@1:4.1.48-9ubuntu0.1+esm3?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:4.1.48-7",
"1:4.1.48-8",
"1:4.1.48-9",
"1:4.1.48-9ubuntu0.1~esm1",
"1:4.1.48-9ubuntu0.1~esm2",
"1:4.1.48-9ubuntu0.1",
"1:4.1.48-9ubuntu0.1+esm1",
"1:4.1.48-9ubuntu0.1+esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnetty-java",
"binary_version": "1:4.1.48-10ubuntu0.25.10.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "netty",
"purl": "pkg:deb/ubuntu/netty@1:4.1.48-10ubuntu0.25.10.2?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:4.1.48-10",
"1:4.1.48-10ubuntu0.25.10.1",
"1:4.1.48-10ubuntu0.25.10.2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnetty-buffer-java",
"binary_version": "1:4.1.48-16ubuntu0.1~esm2"
},
{
"binary_name": "libnetty-common-java",
"binary_version": "1:4.1.48-16ubuntu0.1~esm2"
},
{
"binary_name": "libnetty-java",
"binary_version": "1:4.1.48-16ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "netty",
"purl": "pkg:deb/ubuntu/netty@1:4.1.48-16ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:4.1.48-10",
"1:4.1.48-11",
"1:4.1.48-12",
"1:4.1.48-13",
"1:4.1.48-14",
"1:4.1.48-16",
"1:4.1.48-16ubuntu0.1~esm2"
]
}
],
"aliases": [],
"details": "Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue.",
"id": "UBUNTU-CVE-2026-44249",
"modified": "2026-06-30T16:21:56Z",
"published": "2026-06-11T22:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-44249"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-44249"
},
{
"type": "REPORT",
"url": "https://github.com/netty/netty/security/advisories/GHSA-3qp7-7mw8-wx86"
},
{
"type": "REPORT",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"type": "REPORT",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-44249"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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