UBUNTU-CVE-2026-123575

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Source

https://ubuntu.com/security/CVE-2026-123575

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123575.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-123575

Upstream

CVE-2026-123575

Published

2026-11-09T00:00:00Z

Modified

2026-11-10T02:50:21Z

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

Summary

[none]

Details

Hickory DNS before 0.26.2 contains a resource exhaustion vulnerability in its DNS-over-HTTPS HTTP/2 server that lacks sufficient timeouts or limits for incomplete request bodies. Remote attackers can open DoH connections, send incomplete request bodies, and hold connections open to exhaust server memory.

References

Affected packages

Ubuntu:26.10 / rust-hickory-dns

Package

Name: rust-hickory-dns
Purl: pkg:deb/ubuntu/rust-hickory-dns?arch=source&distro=stonking

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.24.4-1

0.25.2-3

0.26.1-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "hickory-dns",
            "binary_version": "0.26.1-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123575.json"

Ubuntu:26.04:LTS / rust-hickory-dns