DEBIAN-CVE-2026-18321
Buffer overflow in NTPsec's Zyfer refclock allows local attacker to crash ntpd
DEBIAN-CVE-2026-18321
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-18321
ntpsec
Source reference: /affected/0/package/name
- Affected versions
- 1.2.2+dfsg1-1
Source reference:
/affected/0/versions1.2.2+dfsg1-1+deb12u1Source reference:
/affected/0/versions1.2.2+dfsg1-2Source reference:
/affected/0/versions1.2.2+dfsg1-3Source reference:
/affected/0/versions1.2.2+dfsg1-4Source reference:
/affected/0/versions1.2.3+dfsg1-1Source reference:
/affected/0/versions1.2.3+dfsg1-2Source reference:
/affected/0/versions1.2.3+dfsg1-3Source reference:
/affected/0/versions1.2.3+dfsg1-4Source reference:
/affected/0/versions1.2.3+dfsg1-5Source reference:
/affected/0/versions1.2.3+dfsg1-6Source reference:
/affected/0/versions1.2.3+dfsg1-7Source reference:
/affected/0/versions1.2.3+dfsg1-8Source reference:
/affected/0/versions1.2.4+dfsg-1Source reference:
/affected/0/versions1.2.5+dfsg-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
ntpsec
Source reference: /affected/1/package/name
- Affected versions
- 1.2.3+dfsg1-8
Source reference:
/affected/1/versions1.2.4+dfsg-1Source reference:
/affected/1/versions1.2.5+dfsg-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
ntpsec
Source reference: /affected/2/package/name
- Affected versions
- 1.2.3+dfsg1-8
Source reference:
/affected/2/versions1.2.4+dfsg-1Source reference:
/affected/2/versions - Fixed versions
- 1.2.5+dfsg-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ntpsec",
"purl": "pkg:deb/debian/ntpsec?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.2.2+dfsg1-1",
"1.2.2+dfsg1-1+deb12u1",
"1.2.2+dfsg1-2",
"1.2.2+dfsg1-3",
"1.2.2+dfsg1-4",
"1.2.3+dfsg1-1",
"1.2.3+dfsg1-2",
"1.2.3+dfsg1-3",
"1.2.3+dfsg1-4",
"1.2.3+dfsg1-5",
"1.2.3+dfsg1-6",
"1.2.3+dfsg1-7",
"1.2.3+dfsg1-8",
"1.2.4+dfsg-1",
"1.2.5+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18321.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ntpsec",
"purl": "pkg:deb/debian/ntpsec?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.2.3+dfsg1-8",
"1.2.4+dfsg-1",
"1.2.5+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18321.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.5+dfsg-1"
}
]
}
],
"package": {
"name": "ntpsec",
"purl": "pkg:deb/debian/ntpsec?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.2.3+dfsg1-8",
"1.2.4+dfsg-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18321.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57425 · Revision 1
- Added to Heist Feed
- Publisher date