CriticalFix available
libqb — security advisory
log_blackbox.c in libqb before 2.0.8 allows a buffer overflow via long log messages because the header size is not considered.
- Products
- libqb
- Affected versions
- 2.0.10-1, 2.0.10-2, 2.0.6-2, 2.0.7-1, 2.0.8-1, 2.0.8-2, 2.0.9-1
- Fixed versions
- 2.0.8-1
- CVEs
- CVE-2023-39976
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 15:57 UTC · Revision 1
Source evidence
log_blackbox.c in libqb before 2.0.8 allows a buffer overflow via long log messages because the header size is not considered.
osv:DEBIAN-CVE-2023-39976
libqb
Fixed versions: Not specified
libqb
Fixed versions: 2.0.8-1
libqb
Fixed versions: 2.0.8-1
Complete source record
{
"id": "433b0b69c7aced683f39789b4ef7b47e48a29b489dd7302cbec756b2438fa891",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-39976",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2023-39976",
"summary": "log_blackbox.c in libqb before 2.0.8 allows a buffer overflow via long log messages because the header size is not considered.",
"evidence": "osv:DEBIAN-CVE-2023-39976",
"products": [
{
"name": {
"value": "libqb",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.10-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.10-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.6-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.8-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.8-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.9-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libqb",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.0.8-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libqb",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.0.8-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "DEBIAN-CVE-2023-39976",
"aliases": [
"DEBIAN-CVE-2023-39976"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libqb",
"purl": "pkg:deb/debian/libqb?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.0.10-1",
"2.0.10-2",
"2.0.6-2",
"2.0.7-1",
"2.0.8-1",
"2.0.8-2",
"2.0.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-39976.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.8-1"
}
]
}
],
"package": {
"name": "libqb",
"purl": "pkg:deb/debian/libqb?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-39976.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.8-1"
}
]
}
],
"package": {
"name": "libqb",
"purl": "pkg:deb/debian/libqb?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-39976.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T18:02:31.878704134Z",
"provider": "osv",
"upstream": [
"CVE-2023-39976"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-39976"
]
},
"related_cves": [
{
"value": "CVE-2023-39976",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 456181,
"published_at": "2023-08-08T06:15:46.59+00:00"
}