HighFix available
samba — security advisory
A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability.
- Products
- samba
- Affected versions
- Not specified
- Fixed versions
- 4.12.14-r0, 4.13.7-r0, 4.14.2-r0
- CVEs
- CVE-2020-27840
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:09 UTC · Revision 1
Source evidence
A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability.
osv:ALPINE-CVE-2020-27840
samba
Fixed versions: 4.12.14-r0
samba
Fixed versions: 4.13.7-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
samba
Fixed versions: 4.14.2-r0
Complete source record
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"url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-27840",
"method": "structured",
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],
"severity": "high",
"structured": {
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"aliases": [
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"metrics": [
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],
"modified": "2026-10-26T11:17:55.164512450Z",
"provider": "osv",
"upstream": [
"CVE-2020-27840"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2020-27840"
]
},
"related_cves": [
{
"value": "CVE-2020-27840",
"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450586,
"published_at": "2021-05-12T15:15:07.543+00:00"
}