{"id":"CVE-2020-21686","details":"A stack-use-after-scope issue discovered in expand_mmac_params function in preproc.c in nasm before 2.15.04 allows remote attackers to cause a denial of service via crafted asm file.","modified":"2026-09-02T08:09:20.217070Z","published":"2023-08-22T19:16:14.327Z","references":[{"type":"REPORT","url":"https://bugzilla.nasm.us/show_bug.cgi?id=3392643"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/netwide-assembler/nasm","events":[{"introduced":"0"},{"fixed":"77a462b789959390c06970682fdf8e11eb073c13"}],"database_specific":{"cpe":"cpe:2.3:a:nasm:netwide_assembler:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.15.04"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-21686.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}