UBUNTU-CVE-2026-12245

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Source
https://ubuntu.com/security/CVE-2026-12245
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12245.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-12245
Upstream
  • CVE-2026-12245
Downstream
Related
Published
2026-06-25T00:00:00Z
Modified
2026-06-29T13:56:26.693166830Z
Severity
  • 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
  • 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

NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response.

References

Affected packages

Ubuntu:25.10 / nsd

Package

Name
nsd
Purl
pkg:deb/ubuntu/nsd?arch=source&distro=questing

Affected ranges

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

Affected versions

4.*
4.11.1-1
4.12.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.12.0-1",
            "binary_name": "nsd"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12245.json"

Ubuntu:Pro:26.04:LTS / nsd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.14.0-1ubuntu0.1~esm1

Affected versions

4.*
4.12.0-1
4.13.0-6
4.14.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.14.0-1ubuntu0.1~esm1",
            "binary_name": "nsd"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12245.json"