HighFix available
librecad — security advisory
A code execution vulnerability exists in the dxfRW::processLType() functionality of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580. A specially-crafted .dxf file can lead to a use-after-free vulnerability. An attacker can provide a malicious file to trigger this vulnerability.
- Products
- librecad
- Affected versions
- 2.0.4-1build1, 2.0.8-1, 2.0.9-2, 2.1.2-1, 2.1.3-1.2, 2.1.3-1.2build1, 2.2.0-1, 2.2.0.2-1, 2.2.0.2-1build1, 2.2.0.2-1build2, 2.2.0.2-1build3, 2.2.0.2-3
- Fixed versions
- 2.0.9-2ubuntu0.1~esm1, 2.1.2-1ubuntu0.1, 2.1.3-1.2+deb10u1build0.20.04.1
- CVEs
- CVE-2021-21900
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:58 UTC · Revision 1
Source evidence
A code execution vulnerability exists in the dxfRW::processLType() functionality of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580. A specially-crafted .dxf file can lead to a use-after-free vulnerability. An attacker can provide a malicious file to trigger this vulnerability.
osv:UBUNTU-CVE-2021-21900
librecad
Fixed versions: 2.0.9-2ubuntu0.1~esm1
librecad
Fixed versions: 2.1.2-1ubuntu0.1
librecad
Fixed versions: 2.1.3-1.2+deb10u1build0.20.04.1
librecad
Fixed versions: Not specified
librecad
Fixed versions: Not specified
librecad
Fixed versions: Not specified
librecad
Fixed versions: Not specified
Complete source record
{
"id": "371fd0fe68770a928685b4ab6f03e21349586d681c6613d117052db22d04528e",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-21900",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-21900",
"summary": "A code execution vulnerability exists in the dxfRW::processLType() functionality of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580. A specially-crafted .dxf file can lead to a use-after-free vulnerability. An attacker can provide a malicious file to trigger this vulnerability.",
"evidence": "osv:UBUNTU-CVE-2021-21900",
"products": [
{
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{
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"severity": "high",
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"aliases": [
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"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
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{
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{
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],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
},
{
"ranges": [
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],
"package": {
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},
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{
"binary_name": "librecad-data",
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"availability": "No subscription required"
}
},
{
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"modified": "2026-10-17T12:56:19.647103774Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2021-21900",
"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1351",
"https://github.com/LibreCAD/libdxfrw/commit/fcd977cc7f8f6cc7f012e5b72d33cf7d77b3fa69",
"https://ubuntu.com/security/notices/USN-5957-1",
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]
},
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{
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"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
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"source_id": "core-osv",
"document_id": 355274,
"published_at": "2021-11-19T19:15:00+00:00"
}