UBUNTU-CVE-2025-11677

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Source

https://ubuntu.com/security/CVE-2025-11677

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11677.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-11677

Upstream

CVE-2025-11677

Downstream

USN-8024-1

Related

USN-8024-1

Published

2025-10-20T14:15:00Z

Modified

2026-04-22T15:29:54Z

Severity

6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Use After Free in WebSocket server implementation in lws_handshake_server in warmcat libwebsockets may allow an attacker, in specific configurations where the user provides a callback function that handles LWS_CALLBACK_HTTP_CONFIRM_UPGRADE, to achieve denial of service.

References

Affected packages

Ubuntu:Pro:20.04:LTS / libwebsockets

Package

Name: libwebsockets
Purl: pkg:deb/ubuntu/libwebsockets@3.2.1-3ubuntu0.1~esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

3.2.1-3ubuntu0.1~esm1

Affected versions

2.*

2.0.3-3build1

3.*

3.2.1-3

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "3.2.1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "3.2.1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets15",
            "binary_version": "3.2.1-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11677.json"

Ubuntu:22.04:LTS / libwebsockets

Package

Name: libwebsockets
Purl: pkg:deb/ubuntu/libwebsockets@4.0.20-2ubuntu1.1?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

4.0.20-2ubuntu1.1

Affected versions

4.*

4.0.20-2

4.0.20-2ubuntu1

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "4.0.20-2ubuntu1.1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "4.0.20-2ubuntu1.1"
        },
        {
            "binary_name": "libwebsockets16",
            "binary_version": "4.0.20-2ubuntu1.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11677.json"

Ubuntu:Pro:24.04:LTS / libwebsockets

Package

Name: libwebsockets
Purl: pkg:deb/ubuntu/libwebsockets@4.3.3-1.1ubuntu0.1~esm1?arch=source&distro=esm-apps/noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

4.3.3-1.1ubuntu0.1~esm1

Affected versions

4.*

4.3.2-4

4.3.3-1

4.3.3-1.1build1

4.3.3-1.1build2

4.3.3-1.1build3

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libwebsockets-evlib-ev",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-evlib-glib",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-evlib-uv",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets19t64",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11677.json"

Ubuntu:25.10 / libwebsockets

Package

Name: libwebsockets
Purl: pkg:deb/ubuntu/libwebsockets@4.3.5-1?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.3.5-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libwebsockets-evlib-ev",
            "binary_version": "4.3.5-1"
        },
        {
            "binary_name": "libwebsockets-evlib-glib",
            "binary_version": "4.3.5-1"
        },
        {
            "binary_name": "libwebsockets-evlib-uv",
            "binary_version": "4.3.5-1"
        },
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "4.3.5-1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "4.3.5-1"
        },
        {
            "binary_name": "libwebsockets19t64",
            "binary_version": "4.3.5-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-11677.json"