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No exploitation reportedFix available

CVE-2021-21899

No exploitation reported by the sources we read.

  • Published2021-11-19
  • WeaknessCWE-119 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A code execution vulnerability exists in the dwgCompressor::copyCompBytes21 functionality of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580. A specially-crafted .dwg file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

Timeline

dates in UTC
  1. 2021-11-1919:15CVE publishedNVD

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published
11.0= 11.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
34.x= 34no fix published
35.x= 35no fix published
Librecad libdxfrw
BranchAffectedFixed in
2.2= 2.2.0-rc2-19-ge02f3580no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libdxfrwSUSE:Package Hub 15 SP3all versions · fixed in 1.0.1+git.20220109-bp153.2.3.1
  • libdxfrwopenSUSE:Leap 15.3all versions · fixed in 1.0.1+git.20220109-bp153.2.3.1
  • libdxfrwMageia:8all versions · fixed in 1.0.1-1.1.mga8
  • librecadUbuntu:Pro:18.04:LTSall versions · fixed in 2.1.2-1ubuntu0.1~esm1
  • librecadUbuntu:Pro:16.04:LTSall versions · fixed in 2.0.9-2ubuntu0.1~esm1
  • librecadUbuntu:20.04:LTSall versions · fixed in 2.1.3-1.2+deb10u1build0.20.04.1
  • librecadUbuntu:18.04:LTSall versions · fixed in 2.1.2-1ubuntu0.1
  • librecadSUSE:Package Hub 15 SP3all versions · fixed in 2.2.0~rc3-bp153.2.3.1

7 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-21899 Red Hat Product Security

    librecad: heap out-of-bounds write in dwgCompressor:copyCompBytes21

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.18.8read 2026-10-23
  • CNACVSS 3.08.8known since 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • CNAweakness (CWE)CWE-119known since 2026-10-23
  • NVDweakness (CWE)CWE-787read 2026-10-23
  • FIRST EPSSEPSS score2.8 %2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-11-19
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-xwm9-c4jc-crcp

Frequently asked questions

What is CVE-2021-21899?

A code execution vulnerability exists in the dwgCompressor::copyCompBytes21 functionality of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580. A specially-crafted .dwg file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

Is CVE-2021-21899 actively exploited?

Active exploitation of CVE-2021-21899 has not been confirmed. Its EPSS score was 2.8% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-21899?

CVE-2021-21899 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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