{"id":"JLSEC-2026-201","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":"2026-04-27T14:00:31.937961Z","published":"2026-04-27T13:45:07.015Z","upstream":["CVE-2020-21686"],"database_specific":{"sources":[{"html_url":"https://nvd.nist.gov/vuln/detail/CVE-2020-21686","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-21686","modified":"2024-11-21T05:12:48.323Z","imported":"2026-04-27T13:24:12.314Z","database_specific":{"status":"Modified"},"published":"2023-08-22T19:16:14.327Z","id":"CVE-2020-21686"}],"license":"CC-BY-4.0"},"references":[{"type":"WEB","url":"https://bugzilla.nasm.us/show_bug.cgi?id=3392643"},{"type":"WEB","url":"https://bugzilla.nasm.us/show_bug.cgi?id=3392643"}],"affected":[{"package":{"name":"NASM_jll","ecosystem":"Julia","purl":"pkg:julia/NASM_jll?uuid=08ca2550-6d73-57c0-8625-9b24120f3eae"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.16.1+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-201.json"}}],"schema_version":"1.7.5"}