USN-8423-1

It was discovered that lwIP contained a buffer overflow in the EAP authentication handling code. An attacker could possibly use this issue to trigger a buffer overflow, resulting in arbitrary code execution or a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-8597)

It was discovered that lwIP incorrectly handled certain ICMPv6 or 6LoWPAN packets. An attacker could possibly use this issue to trigger a buffer overflow, resulting in information disclosure. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-22283, CVE-2020-22284)

It was discovered that lwIP did not properly validate certain SNMPv3 authentication parameters. An attacker could possibly use this issue to trigger a stack-based buffer overflow, resulting in arbitrary code execution or a denial of service. (CVE-2026-8836)

References

Affected packages

Ubuntu:Pro:20.04:LTS / lwip

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.1.2+dfsg1-4ubuntu0.1~esm1

Affected versions

2.*

2.1.2-3

2.1.2-5.1

2.1.2+dfsg1-1

2.1.2+dfsg1-4

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "liblwip0",
            "binary_version": "2.1.2+dfsg1-4ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": []
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8423-1.json"

Ubuntu:Pro:22.04:LTS / lwip

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.1.3+dfsg1-1ubuntu0.1~esm1

Affected versions

2.*

2.1.2+dfsg1-8

2.1.2+dfsg1-9

2.1.3+dfsg1-1

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "liblwip0",
            "binary_version": "2.1.3+dfsg1-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:22.04:LTS",
    "cves": []
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8423-1.json"

Ubuntu:Pro:24.04:LTS / lwip

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.2.0+dfsg1-6.1ubuntu0.1~esm1

Affected versions

2.*

2.1.3+dfsg1-2

2.1.3+dfsg1-4

2.2.0+dfsg1-2

2.2.0+dfsg1-3

2.2.0+dfsg1-4

2.2.0+dfsg1-5

2.2.0+dfsg1-6

2.2.0+dfsg1-6.1

2.2.0+dfsg1-6.1build1

2.2.0+dfsg1-6.1build2

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "liblwip0t64",
            "binary_version": "2.2.0+dfsg1-6.1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:24.04:LTS",
    "cves": []
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8423-1.json"

Ubuntu:Pro:26.04:LTS / lwip

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.2.1+dfsg1-4ubuntu0.1~esm1

Affected versions

2.*

2.2.1+dfsg1-2

2.2.1+dfsg1-3

2.2.1+dfsg1-4

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "liblwip0t64",
            "binary_version": "2.2.1+dfsg1-4ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:26.04:LTS",
    "cves": []
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8423-1.json"