UBUNTU-CVE-2026-67858

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Source

https://ubuntu.com/security/CVE-2026-67858

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67858.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-67858

Upstream

CVE-2026-67858

Published

2026-08-04T22:17:00Z

Modified

2026-08-06T03:11:25.447386351Z

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

Buffer Overflow vulnerability exists in open62541 1.5.5 when the Local Discovery Server (LDS) is built with multicast discovery enabled through the MDNSD backend. An unauthenticated remote attacker can send a RegisterServer or RegisterServer2 request containing many unique discoveryUrls. This allows remote attackers to cause a denial of service.

References

Affected packages

Ubuntu:26.04:LTS / open62541

Package

Name: open62541
Purl: pkg:deb/ubuntu/open62541?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.4.11.1-1

1.4.11.1-1build1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.4.11.1-1build1",
            "binary_name": "libopen62541-1.4"
        },
        {
            "binary_version": "1.4.11.1-1build1",
            "binary_name": "libopen62541-1.4-tools"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67858.json"