DEBIAN-CVE-2026-11610
A heap buffer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). After a successful SASL bind with integrity protection (SSF > 0), an authenticated attacker can send a specially crafted oversized LDAP UNBIND packet that is copied into a 512-byte heap receive buffer without a bounds check in sasl_io_recv() in sasl_io.c. This allows up to approximately 2 megabytes of attacker-controlled data to overflow the buffer, causing a denial of service (server crash). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, any enrolled host, or any service account can trigger this vulnerability over the network after authenticating via GSSAPI. The vulnerable code path has existed since approximately 2013 (389-ds-base 1.3.2) and was not addressed by the CVE-2025-14905 fix, which patched a separate heap overflow in schema.c only.
DEBIAN-CVE-2026-11610
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-2026-11610
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-2026-11610.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-2026-11610.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55477 · Revision 1
- Added to Heist Feed
- Publisher date