MediumFix available
cflow — security advisory
Use-after-Free vulnerability in cflow 1.6 in the void call(char *name, int line) function at src/parser.c, which could cause a denial of service via the pointer variable caller->callee.
- Products
- cflow
- Affected versions
- Not specified
- Fixed versions
- 1:1.6-6
- CVEs
- CVE-2020-23856
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:46 UTC · Revision 1
Source evidence
Use-after-Free vulnerability in cflow 1.6 in the void call(char *name, int line) function at src/parser.c, which could cause a denial of service via the pointer variable caller->callee.
osv:DEBIAN-CVE-2020-23856
cflow
Fixed versions: 1:1.6-6
cflow
Fixed versions: 1:1.6-6
cflow
Fixed versions: 1:1.6-6
Complete source record
{
"id": "d12f6e195481fab3a366326f2e1a0c3490675a05677a0e5c05cd32aba2d2b1f8",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-23856",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2020-23856",
"summary": "Use-after-Free vulnerability in cflow 1.6 in the void call(char *name, int line) function at src/parser.c, which could cause a denial of service via the pointer variable caller->callee.",
"evidence": "osv:DEBIAN-CVE-2020-23856",
"products": [
{
"name": {
"value": "cflow",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.6-6",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "cflow",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
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"evidence": "/affected/2/package/name"
},
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"fixed_versions": [
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}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2020-23856",
"aliases": [
"DEBIAN-CVE-2020-23856"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
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"events": [
{
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},
{
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}
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],
"package": {
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"purl": "pkg:deb/debian/cflow?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-23856.json"
},
"ecosystem_specific": {
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},
{
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],
"package": {
"name": "cflow",
"purl": "pkg:deb/debian/cflow?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-23856.json"
},
"ecosystem_specific": {
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},
{
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],
"package": {
"name": "cflow",
"purl": "pkg:deb/debian/cflow?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-23856.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-26T12:00:51.169227902Z",
"provider": "osv",
"upstream": [
"CVE-2020-23856"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2020-23856"
]
},
"related_cves": [
{
"value": "CVE-2020-23856",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 451356,
"published_at": "2021-05-18T15:15:07.877+00:00"
}