An issue was discovered in GNU LibreDWG before 0.93. There is a double-free in dwg_free in free.c.
https://github.com/LibreDWG/libredwg/compare/0.9.2...0.9.3
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00045.html
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00033.html
https://github.com/LibreDWG/libredwg/issues/176#issuecomment-568643172
https://github.com/LibreDWG/libredwg/issues/176
Source: Mitre, NVD
Published: 2019-12-27
Updated: 2020-05-22
Base Score: 6.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00451