HighFix available
openldap — security advisory
In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet, resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime.
- Products
- openldap
- Affected versions
- Not specified
- Fixed versions
- 2.4.50-r2, 2.4.57-r1
- CVEs
- CVE-2021-27212
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 22:03 UTC · Revision 1
Source evidence
In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet, resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime.
osv:ALPINE-CVE-2021-27212
openldap
Fixed versions: 2.4.50-r2
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
openldap
Fixed versions: 2.4.57-r1
Complete source record
{
"id": "485b98070051133ec160af22b89bfd9acfca6e994cdb1e9efb9af0185d7e1a2f",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2021-27212",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2021-27212",
"summary": "In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet, resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime.",
"evidence": "osv:ALPINE-CVE-2021-27212",
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{
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{
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{
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{
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"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "ALPINE-CVE-2021-27212",
"aliases": [
"ALPINE-CVE-2021-27212"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
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"affected": [
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"ecosystem": "Alpine:v3.24"
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],
"modified": "2026-10-23T17:17:56.164708897Z",
"provider": "osv",
"upstream": [
"CVE-2021-27212"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2021-27212"
]
},
"related_cves": [
{
"value": "CVE-2021-27212",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 415362,
"published_at": "2021-02-14T03:15:12.957+00:00"
}