DEBIAN-CVE-2026-12528
A flaw was found in 389 Directory Server in the __aclp__normalize_acltxt() function of aclparse.c. A malformed ACI (Access Control Instruction) string can trigger heap-buffer-overflow writes and reads during ACI parsing. The function fails to validate that the ACI keyword has sufficient length after whitespace stripping, leading to a 1-byte out-of-bounds write and subsequent out-of-bounds reads. An authenticated user with write access to the aci attribute could send a crafted ACI value to silently corrupt heap memory in the directory server process.
DEBIAN-CVE-2026-12528
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-2026-12528
389-ds-base
Source reference: /affected/0/package/name
- Affected versions
- 2.3.1+dfsg1-1
Source reference:
/affected/0/versions2.3.1+dfsg1-1+deb12u1Source reference:
/affected/0/versions2.3.4+dfsg1-1Source reference:
/affected/0/versions2.3.4+dfsg1-1.1Source reference:
/affected/0/versions2.4.4+dfsg1-1Source reference:
/affected/0/versions2.4.4+dfsg1-3Source reference:
/affected/0/versions2.4.5+dfsg1-1Source reference:
/affected/0/versions3.0.2+dfsg1-1Source reference:
/affected/0/versions3.1.1+dfsg1-1Source reference:
/affected/0/versions3.1.1+dfsg1-2Source reference:
/affected/0/versions3.1.1+dfsg1-3Source reference:
/affected/0/versions3.1.2+dfsg1-1Source reference:
/affected/0/versions3.1.2+vendor1-1Source reference:
/affected/0/versions3.1.2+vendor1-2Source reference:
/affected/0/versions3.3.0-1Source reference:
/affected/0/versions3.3.0-2Source reference:
/affected/0/versions3.3.1-1Source reference:
/affected/0/versions3.3.1-3Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
389-ds-base
Source reference: /affected/1/package/name
- Affected versions
- 3.1.2+dfsg1-1
Source reference:
/affected/1/versions3.1.2+dfsg1-1+deb13u1Source reference:
/affected/1/versions3.1.2+vendor1-1Source reference:
/affected/1/versions3.1.2+vendor1-2Source reference:
/affected/1/versions3.3.0-1Source reference:
/affected/1/versions3.3.0-2Source reference:
/affected/1/versions3.3.1-1Source reference:
/affected/1/versions3.3.1-3Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- 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": "389-ds-base",
"purl": "pkg:deb/debian/389-ds-base?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.3.1+dfsg1-1",
"2.3.1+dfsg1-1+deb12u1",
"2.3.4+dfsg1-1",
"2.3.4+dfsg1-1.1",
"2.4.4+dfsg1-1",
"2.4.4+dfsg1-3",
"2.4.5+dfsg1-1",
"3.0.2+dfsg1-1",
"3.1.1+dfsg1-1",
"3.1.1+dfsg1-2",
"3.1.1+dfsg1-3",
"3.1.2+dfsg1-1",
"3.1.2+vendor1-1",
"3.1.2+vendor1-2",
"3.3.0-1",
"3.3.0-2",
"3.3.1-1",
"3.3.1-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12528.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "389-ds-base",
"purl": "pkg:deb/debian/389-ds-base?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.1.2+dfsg1-1",
"3.1.2+dfsg1-1+deb13u1",
"3.1.2+vendor1-1",
"3.1.2+vendor1-2",
"3.3.0-1",
"3.3.0-2",
"3.3.1-1",
"3.3.1-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12528.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55491 · Revision 1
- Added to Heist Feed
- Publisher date