{"id":"UBUNTU-CVE-2020-18780","details":"A Use After Free vulnerability in function new_Token in asm/preproc.c in nasm 2.14.02 allows attackers to cause a denial of service via crafted nasm command.","modified":"2025-10-24T04:48:38Z","published":"2023-08-22T19:15:00Z","upstream":["CVE-2020-18780"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-18780"},{"type":"REPORT","url":"https://bugzilla.nasm.us/show_bug.cgi?id=3392634"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-18780"}],"affected":[{"package":{"name":"nasm","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/nasm@2.11.08-1ubuntu0.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.11.06-1really2.11.05-1","2.11.08-1","2.11.08-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"nasm","binary_version":"2.11.08-1ubuntu0.1"}],"priority_reason":"ej7367\u003e Crash in CLI tool - minimal security impact."},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-18780.json"}},{"package":{"name":"nasm","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/nasm@2.13.02-0.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.13.01-2","2.13.02-0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"nasm","binary_version":"2.13.02-0.1"}],"priority_reason":"ej7367\u003e Crash in CLI tool - minimal security impact."},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-18780.json"}},{"package":{"name":"nasm","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/nasm@2.14.02-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.14.02-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.14.02-1","binary_name":"nasm"}],"priority_reason":"ej7367\u003e Crash in CLI tool - minimal security impact."},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-18780.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}