DEBIAN-CVE-2026-11791
A flaw was found in 389 Directory Server. During schema reload, the attr_syntax_swap_ht() function unconditionally frees attribute syntax information nodes, bypassing the refcount-based deferred deletion used elsewhere in the attribute syntax subsystem. If an administrator triggers schema reload while concurrent LDAP query traffic is active, worker threads may access freed memory, resulting in use-after-free or double-free and a denial of service (server crash).
DEBIAN-CVE-2026-11791
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-2026-11791
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-2026-11791.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-2026-11791.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55458 · Revision 1
- Added to Heist Feed
- Publisher date