UBUNTU-CVE-2026-42587

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Source

https://ubuntu.com/security/CVE-2026-42587

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42587.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-42587

Upstream

CVE-2026-42587

Published

2026-05-13T19:17:00Z

Modified

2026-05-20T22:01:29.816853868Z

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

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpContentDecompressor accepts a maxAllocation parameter to limit decompression buffer size and prevent decompression bomb attacks. This limit is correctly enforced for gzip and deflate encodings via ZlibDecoder, but is silently ignored when the content encoding is br (Brotli), zstd, or snappy. An attacker can bypass the configured decompression limit by sending a compressed payload with Content-Encoding: br instead of Content-Encoding: gzip, causing unbounded memory allocation and out-of-memory denial of service. The same vulnerability exists in DelegatingDecompressorFrameListener for HTTP/2 connections. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.

References

Affected packages

Ubuntu:25.10

netty

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:4.*

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-java",
            "binary_version": "1:4.1.48-10ubuntu0.25.10.2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42587.json"

Ubuntu:26.04:LTS

netty

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:4.*

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

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libnetty-buffer-java",
            "binary_version": "1:4.1.48-16"
        },
        {
            "binary_name": "libnetty-common-java",
            "binary_version": "1:4.1.48-16"
        },
        {
            "binary_name": "libnetty-java",
            "binary_version": "1:4.1.48-16"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42587.json"

Ubuntu:Pro:14.04:LTS

netty

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:3.*

1:3.2.6.Final-2

1:3.2.6.Final-2+deb8u2build0.14.04.1~esm1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libnetty-java",
            "binary_version": "1:3.2.6.Final-2+deb8u2build0.14.04.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42587.json"

Ubuntu:Pro:16.04:LTS

netty

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:3.*

1:3.2.6.Final-2

1:4.*

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

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libnetty-java",
            "binary_version": "1:4.0.34-1ubuntu0.1~esm3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42587.json"

Ubuntu:Pro:18.04:LTS

netty

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:4.*

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

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libnetty-java",
            "binary_version": "1:4.1.7-4ubuntu0.1+esm5"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42587.json"

Ubuntu:Pro:20.04:LTS

netty

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:4.*

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

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libnetty-java",
            "binary_version": "1:4.1.45-1ubuntu0.1~esm4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42587.json"

Ubuntu:Pro:22.04:LTS

netty

Package

Name: netty
Purl: pkg:deb/ubuntu/netty?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:4.*

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

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libnetty-java",
            "binary_version": "1:4.1.48-4+deb11u2ubuntu0.1+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42587.json"

Ubuntu:Pro:24.04:LTS

netty

Package

Name: netty
Purl: pkg:deb/ubuntu/netty?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1:4.*

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

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libnetty-java",
            "binary_version": "1:4.1.48-9ubuntu0.1+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42587.json"