HighFix available
opensmtpd — security advisory
smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a "very significant" memory leak via messages to an instance that performs many regex lookups.
- Products
- opensmtpd
- Affected versions
- Not specified
- Fixed versions
- 6.6.4p1-r1, 6.6.4p1-r2, 6.7.1p1-r1
- CVEs
- CVE-2020-35679
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:10 UTC · Revision 1
Source evidence
smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a "very significant" memory leak via messages to an instance that performs many regex lookups.
osv:ALPINE-CVE-2020-35679
opensmtpd
Fixed versions: 6.6.4p1-r1
opensmtpd
Fixed versions: 6.6.4p1-r2
opensmtpd
Fixed versions: 6.7.1p1-r1
Complete source record
{
"id": "dbb3c8602b72720be35b0f05d0a2834bdd249e49439ce8f72bcdbdbc6733b1de",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-35679",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2020-35679",
"summary": "smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a \"very significant\" memory leak via messages to an instance that performs many regex lookups.",
"evidence": "osv:ALPINE-CVE-2020-35679",
"products": [
{
"name": {
"value": "opensmtpd",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.6.4p1-r1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "opensmtpd",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.6.4p1-r2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "opensmtpd",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "6.7.1p1-r1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "ALPINE-CVE-2020-35679",
"aliases": [
"ALPINE-CVE-2020-35679"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.6.4p1-r1"
}
]
}
],
"package": {
"name": "opensmtpd",
"purl": "pkg:apk/alpine/opensmtpd?arch=source",
"ecosystem": "Alpine:v3.11"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-35679.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.6.4p1-r2"
}
]
}
],
"package": {
"name": "opensmtpd",
"purl": "pkg:apk/alpine/opensmtpd?arch=source",
"ecosystem": "Alpine:v3.12"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-35679.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.7.1p1-r1"
}
]
}
],
"package": {
"name": "opensmtpd",
"purl": "pkg:apk/alpine/opensmtpd?arch=source",
"ecosystem": "Alpine:v3.13"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-35679.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-26T11:17:55.173495278Z",
"provider": "osv",
"upstream": [
"CVE-2020-35679"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2020-35679"
]
},
"related_cves": [
{
"value": "CVE-2020-35679",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450635,
"published_at": "2020-12-24T16:15:15.537+00:00"
}