Medium
libical3 — security advisory
libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.
- Products
- libical3
- Affected versions
- 3.0.16-1, 3.0.17-1, 3.0.17-1.1, 3.0.17-1.1~exp1, 3.0.18-1, 3.0.19-1, 3.0.19-2, 3.0.19-3, 3.0.19-4, 3.0.20-1, 3.0.20-2, 3.0.20-3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-88383
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 03:41 UTC · Revision 1
Source evidence
libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.
osv:DEBIAN-CVE-2026-88383
libical3
Fixed versions: Not specified
libical3
Fixed versions: Not specified
libical3
Fixed versions: Not specified
Complete source record
{
"id": "50f9939fc6fb466be8729a5a2bf6277a6221d452b0c7053a6f8972105938120e",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-88383",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-88383",
"summary": "libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.",
"evidence": "osv:DEBIAN-CVE-2026-88383",
"products": [
{
"name": {
"value": "libical3",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.0.16-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.17-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.17-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.17-1.1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.18-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.19-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.19-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.19-3",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.19-4",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.20-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.20-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.0.20-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libical3",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.0.20-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.0.20-2",
"evidence": "/affected/1/versions"
},
{
"value": "3.0.20-3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libical3",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.0.20-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.20-2",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.20-3",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-88383",
"aliases": [
"DEBIAN-CVE-2026-88383"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libical3",
"purl": "pkg:deb/debian/libical3?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.0.16-1",
"3.0.17-1",
"3.0.17-1.1",
"3.0.17-1.1~exp1",
"3.0.18-1",
"3.0.19-1",
"3.0.19-2",
"3.0.19-3",
"3.0.19-4",
"3.0.20-1",
"3.0.20-2",
"3.0.20-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88383.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libical3",
"purl": "pkg:deb/debian/libical3?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.0.20-1",
"3.0.20-2",
"3.0.20-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88383.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libical3",
"purl": "pkg:deb/debian/libical3?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.0.20-1",
"3.0.20-2",
"3.0.20-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88383.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-07T10:00:13.087359860Z",
"provider": "osv",
"upstream": [
"CVE-2026-88383"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-88383"
]
},
"related_cves": [
{
"value": "CVE-2026-88383",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 94691,
"published_at": "2026-09-24T17:17:07.787+00:00"
}