DEBIAN-CVE-2026-12725
A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and query logging are both enabled, logging of DS or DNSKEY replies containing unsupported algorithm or digest types can cause dnsmasq to write past the end of an internal logging buffer. A remote attacker able to supply such a DNS response may crash the dnsmasq process, resulting in denial of service.
DEBIAN-CVE-2026-12725
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-2026-12725
dnsmasq
Source reference: /affected/0/package/name
- Affected versions
- 2.89-1
Source reference:
/affected/0/versions2.90-1Source reference:
/affected/0/versions2.90-2Source reference:
/affected/0/versions2.90-3Source reference:
/affected/0/versions2.90-4Source reference:
/affected/0/versions2.90-4~deb12u1Source reference:
/affected/0/versions2.90-4~deb12u2Source reference:
/affected/0/versions2.90-5Source reference:
/affected/0/versions2.90-6Source reference:
/affected/0/versions2.90-7Source reference:
/affected/0/versions2.91-1Source reference:
/affected/0/versions2.91~test6-1Source reference:
/affected/0/versions2.91~test9-1Source reference:
/affected/0/versions2.92-1Source reference:
/affected/0/versions2.92-1+exp1Source reference:
/affected/0/versions2.92-1~exp1Source reference:
/affected/0/versions2.92-2Source reference:
/affected/0/versions2.92-3Source reference:
/affected/0/versions2.92-4Source reference:
/affected/0/versions2.92-5Source reference:
/affected/0/versions2.92~rc1-1Source reference:
/affected/0/versions2.92~rc3-1Source reference:
/affected/0/versions2.93-1Source reference:
/affected/0/versions2.93-2Source reference:
/affected/0/versions2.93-3Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
dnsmasq
Source reference: /affected/1/package/name
- Affected versions
- 2.91-1
Source reference:
/affected/1/versions2.91-1+deb13u1Source reference:
/affected/1/versions - Fixed versions
- 2.91-1+deb13u2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
dnsmasq
Source reference: /affected/2/package/name
- Affected versions
- 2.91-1
Source reference:
/affected/2/versions2.92-1Source reference:
/affected/2/versions2.92-1+exp1Source reference:
/affected/2/versions2.92-1~exp1Source reference:
/affected/2/versions2.92-2Source reference:
/affected/2/versions2.92-3Source reference:
/affected/2/versions2.92-4Source reference:
/affected/2/versions2.92-5Source reference:
/affected/2/versions2.92~rc1-1Source reference:
/affected/2/versions2.92~rc3-1Source reference:
/affected/2/versions - Fixed versions
- 2.93-1
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": "dnsmasq",
"purl": "pkg:deb/debian/dnsmasq?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.89-1",
"2.90-1",
"2.90-2",
"2.90-3",
"2.90-4",
"2.90-4~deb12u1",
"2.90-4~deb12u2",
"2.90-5",
"2.90-6",
"2.90-7",
"2.91-1",
"2.91~test6-1",
"2.91~test9-1",
"2.92-1",
"2.92-1+exp1",
"2.92-1~exp1",
"2.92-2",
"2.92-3",
"2.92-4",
"2.92-5",
"2.92~rc1-1",
"2.92~rc3-1",
"2.93-1",
"2.93-2",
"2.93-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12725.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.91-1+deb13u2"
}
]
}
],
"package": {
"name": "dnsmasq",
"purl": "pkg:deb/debian/dnsmasq?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.91-1",
"2.91-1+deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12725.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.93-1"
}
]
}
],
"package": {
"name": "dnsmasq",
"purl": "pkg:deb/debian/dnsmasq?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.91-1",
"2.92-1",
"2.92-1+exp1",
"2.92-1~exp1",
"2.92-2",
"2.92-3",
"2.92-4",
"2.92-5",
"2.92~rc1-1",
"2.92~rc3-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12725.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55495 · Revision 1
- Added to Heist Feed
- Publisher date