What’s Vulnerable › Vulnerabilities

CVE-2021-21900

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-11-19 · updated 2026-06-17
• Weakness: CWE-416

Description

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.

Affected products

• Debian Linux: 9.0, 10.0, 11.0
• Fedoraproject Fedora: 34, 35
• LibreCAD libdxfrw: 2.2.0-rc2-19-ge02f3580

References

• https://lists.debian.org/debian-lts-announce/2021/12/msg00002.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RDI3HCTCACMIC7I4ILB3NRU6DCMADI5H/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTIAMP7QJDKV4ADDLR4GVVX2TXYLHVOZ/
• https://security.gentoo.org/glsa/202305-26
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1351
• https://www.debian.org/security/2022/dsa-5077
• https://lists.debian.org/debian-lts-announce/2021/12/msg00002.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RDI3HCTCACMIC7I4ILB3NRU6DCMADI5H/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTIAMP7QJDKV4ADDLR4GVVX2TXYLHVOZ/
• https://security.gentoo.org/glsa/202305-26
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1351
• https://www.debian.org/security/2022/dsa-5077

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