{"action":"Upgrade nasm to 2.15.04-1 or later.","affected":[{"fixed":"2.15.04-1","introduced":"0"}],"component":"nasm","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2.15.04-1"],"id":"tcs_01M5NESN3CB7N0X8728KYCJX0G","modified_at":"2026-10-26T12:02:30.219336460Z","published_at":"2023-08-22T19:16:15Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-21687","https://security-tracker.debian.org/tracker/CVE-2020-21687"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-21687","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-21687"}],"summary":"Buffer Overflow vulnerability in scan function in stdscan.c in nasm 2.15rc0 allows remote attackers to cause a denial of service via crafted asm file."}