DEBIAN-CVE-2026-11774
An integer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), adding sizeof(uint32_t) to a crafted SASL packet length prefix of 0xFFFFFFFC causes unsigned wraparound to zero, bypassing the nsslapd-maxsasliosize limit and leading to a heap buffer overflow of up to approximately 2 megabytes of attacker-controlled data. After a successful SASL bind with integrity protection (SSF > 0), a remote attacker can cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, enrolled host, or service account can trigger this vulnerability over the network. This flaw is independent of CVE-2025-14905, which patched schema.c only and did not modify sasl_io.c.
DEBIAN-CVE-2026-11774
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-2026-11774
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-2026-11774.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-2026-11774.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55455 · Revision 1
- Added to Heist Feed
- Publisher date