Medium
dnsmasq — security advisory
A flow has been identified into dnssec.c library, causing an infinite loop to dnsmasq service. An attacker who controls any DNSSEC-signed zone can hang the dnsmasq process with a single crafted response, killing all DNS resolution for its clients.
- Products
- dnsmasq
- Affected versions
- 2.66-4ubuntu1, 2.67-1, 2.68-1, 2.68-1ubuntu0.1, 2.68-1ubuntu0.2, 2.68-1ubuntu0.2+esm1, 2.68-1ubuntu0.2+esm2, 2.68-1ubuntu0.2+esm3, 2.68-1ubuntu0.2+esm5, 2.68-1ubuntu0.2+esm6, 2.75-1, 2.75-1ubuntu0.16.04.1, 2.75-1ubuntu0.16.04.10, 2.75-1ubuntu0.16.04.10+esm1, 2.75-1ubuntu0.16.04.2, 2.75-1ubuntu0.16.04.3, 2.75-1ubuntu0.16.04.4, 2.75-1ubuntu0.16.04.5, 2.75-1ubuntu0.16.04.7, 2.75-1ubuntu0.16.04.8, 2.78-1, 2.78-3, 2.79-1, 2.79-1ubuntu0.16.04.1+esm1, 2.79-1ubuntu0.16.04.1+esm2, 2.79-1ubuntu0.2, 2.79-1ubuntu0.3, 2.79-1ubuntu0.4, 2.79-1ubuntu0.5, 2.79-1ubuntu0.6, 2.79-1ubuntu0.7, 2.80-1.1ubuntu1, 2.80-1.1ubuntu1.2, 2.80-1.1ubuntu1.3, 2.80-1.1ubuntu1.4, 2.80-1.1ubuntu1.5, 2.80-1.1ubuntu1.6, 2.80-1.1ubuntu1.7, 2.80-1ubuntu2, 2.80-1ubuntu4, 2.85-1ubuntu2, 2.86-1.1, 2.86-1.1ubuntu0.1, 2.86-1.1ubuntu0.2, 2.86-1.1ubuntu0.3, 2.86-1.1ubuntu0.4, 2.86-1.1ubuntu0.5, 2.89-1, 2.90-0ubuntu0.16.04.1+esm1, 2.90-0ubuntu0.16.04.1+esm3, 2.90-0ubuntu0.16.04.1+esm4, 2.90-0ubuntu0.18.04.1+esm1, 2.90-0ubuntu0.18.04.1+esm3, 2.90-0ubuntu0.18.04.1+esm4, 2.90-0ubuntu0.20.04.1, 2.90-0ubuntu0.20.04.1+esm2, 2.90-0ubuntu0.20.04.1+esm3, 2.90-0ubuntu0.22.04.1, 2.90-0ubuntu0.22.04.3, 2.90-0ubuntu0.22.04.4, 2.90-2, 2.90-2build1, 2.90-2build2, 2.90-2ubuntu0.1, 2.90-2ubuntu0.3, 2.90-2ubuntu0.4, 2.91-0ubuntu0.22.04.1, 2.91-0ubuntu0.22.04.2, 2.91-0ubuntu0.24.04.1, 2.91-0ubuntu0.24.04.2, 2.91-1build1, 2.92-1, 2.92-1ubuntu0.2, 2.92-1ubuntu0.3, 2.92-1ubuntu0.4, 2.92-1ubuntu0.5, 2.92~rc3-1, 2.93-1, 2.93-3ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-13002
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:54 UTC · Revision 1
Source evidence
A flow has been identified into dnssec.c library, causing an infinite loop to dnsmasq service. An attacker who controls any DNSSEC-signed zone can hang the dnsmasq process with a single crafted response, killing all DNS resolution for its clients.
osv:UBUNTU-CVE-2026-13002
dnsmasq
Fixed versions: Not specified
dnsmasq
Fixed versions: Not specified
dnsmasq
Fixed versions: Not specified
dnsmasq
Fixed versions: Not specified
dnsmasq
Fixed versions: Not specified
dnsmasq
Fixed versions: Not specified
dnsmasq
Fixed versions: Not specified
dnsmasq
Fixed versions: Not specified
Complete source record
{
"id": "ef306d4280ce591e1d522be31930c84ebdd1c9e8fbce998ab750c63c5bf09a06",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-13002",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-13002",
"summary": "A flow has been identified into dnssec.c library, causing an infinite loop to dnsmasq service. An attacker who controls any DNSSEC-signed zone can hang the dnsmasq process with a single crafted response, killing all DNS resolution for its clients.",
"evidence": "osv:UBUNTU-CVE-2026-13002",
"products": [
{
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{
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},
{
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"evidence": "/affected/0/versions"
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{
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},
{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/1/versions"
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{
"value": "2.79-1ubuntu0.16.04.1+esm1",
"evidence": "/affected/1/versions"
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{
"value": "2.79-1ubuntu0.16.04.1+esm2",
"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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{
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{
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},
{
"name": {
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"affected_versions": [
{
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{
"value": "2.78-3",
"evidence": "/affected/2/versions"
},
{
"value": "2.79-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.79-1ubuntu0.2",
"evidence": "/affected/2/versions"
},
{
"value": "2.79-1ubuntu0.3",
"evidence": "/affected/2/versions"
},
{
"value": "2.79-1ubuntu0.4",
"evidence": "/affected/2/versions"
},
{
"value": "2.79-1ubuntu0.5",
"evidence": "/affected/2/versions"
},
{
"value": "2.79-1ubuntu0.6",
"evidence": "/affected/2/versions"
},
{
"value": "2.79-1ubuntu0.7",
"evidence": "/affected/2/versions"
},
{
"value": "2.90-0ubuntu0.18.04.1+esm1",
"evidence": "/affected/2/versions"
},
{
"value": "2.90-0ubuntu0.18.04.1+esm3",
"evidence": "/affected/2/versions"
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{
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]
},
{
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"evidence": "/affected/3/package/name"
},
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"affected_versions": [
{
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},
{
"value": "2.80-1ubuntu4",
"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
},
{
"value": "2.80-1.1ubuntu1.2",
"evidence": "/affected/3/versions"
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{
"value": "2.80-1.1ubuntu1.3",
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{
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{
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{
"value": "2.80-1.1ubuntu1.6",
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{
"value": "2.80-1.1ubuntu1.7",
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{
"value": "2.90-0ubuntu0.20.04.1",
"evidence": "/affected/3/versions"
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{
"value": "2.90-0ubuntu0.20.04.1+esm2",
"evidence": "/affected/3/versions"
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{
"value": "2.90-0ubuntu0.20.04.1+esm3",
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]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/4/versions"
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{
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{
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{
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{
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{
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{
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{
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{
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},
{
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{
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},
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{
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{
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},
{
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{
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],
"severity": "medium",
"structured": {
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"aliases": [
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],
"metrics": [
{
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{
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},
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},
"ecosystem_specific": {
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}
},
{
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],
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},
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"2.90-0ubuntu0.18.04.1+esm4"
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"database_specific": {
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},
"ecosystem_specific": {
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},
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"2.90-0ubuntu0.20.04.1+esm3"
],
"database_specific": {
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},
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{
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],
"package": {
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"purl": "pkg:deb/ubuntu/dnsmasq?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.85-1ubuntu2",
"2.86-1.1",
"2.86-1.1ubuntu0.1",
"2.86-1.1ubuntu0.2",
"2.86-1.1ubuntu0.3",
"2.86-1.1ubuntu0.4",
"2.86-1.1ubuntu0.5",
"2.90-0ubuntu0.22.04.1",
"2.90-0ubuntu0.22.04.3",
"2.90-0ubuntu0.22.04.4",
"2.91-0ubuntu0.22.04.1",
"2.91-0ubuntu0.22.04.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13002.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "dnsmasq",
"binary_version": "2.91-0ubuntu0.22.04.2"
},
{
"binary_name": "dnsmasq-base",
"binary_version": "2.91-0ubuntu0.22.04.2"
},
{
"binary_name": "dnsmasq-base-lua",
"binary_version": "2.91-0ubuntu0.22.04.2"
},
{
"binary_name": "dnsmasq-utils",
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}
]
}
},
{
"ranges": [
{
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"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "dnsmasq",
"purl": "pkg:deb/ubuntu/dnsmasq?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2.89-1",
"2.90-2",
"2.90-2build1",
"2.90-2build2",
"2.90-2ubuntu0.1",
"2.90-2ubuntu0.3",
"2.90-2ubuntu0.4",
"2.91-0ubuntu0.24.04.1",
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},
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}
],
"modified": "2026-10-17T12:59:52.951669592Z",
"provider": "osv",
"upstream": [
"CVE-2026-13002"
],
"references": [
"https://ubuntu.com/security/CVE-2026-13002",
"https://www.cve.org/CVERecord?id=CVE-2026-13002",
"https://access.redhat.com/security/cve/CVE-2026-13002"
]
},
"related_cves": [
{
"value": "CVE-2026-13002",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359843,
"published_at": "2026-08-14T16:16:00+00:00"
}