UBUNTU-CVE-2026-123592

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Source
https://ubuntu.com/security/CVE-2026-123592
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123592.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-123592
Upstream
Published
2026-11-09T00:00:00Z
Modified
2026-11-10T02:50:13Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The hickory-net crate in Hickory DNS 0.26.0-beta.1 before 0.26.2 allows DNSSEC validation bypass because Name's Hash ignores label lengths and ValidationCacheKey compares only that hash. An attacker controlling an unsigned delegation whose name differs from a signed target only in dot positions can prime an Insecure verdict, causing forged answers for the target to skip signature verification instead of returning SERVFAIL.

References

Affected packages

Ubuntu:26.10 / rust-hickory-net

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.26.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-hickory-net-dev",
            "binary_version": "0.26.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123592.json"