{"action":"Upgrade upx to 4.0.0-r0 or later.","affected":[{"fixed":"4.0.0-r0","introduced":"0"}],"component":"upx","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.23","exploited":false,"fixed_versions":["4.0.0-r0"],"id":"tcs_01M6GNXRZFQD1NY7TFG2ESFAPM","modified_at":"2026-11-03T06:32:28.434970280Z","published_at":"2021-05-27T00:15:08.527Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2021-30501","https://security.alpinelinux.org/vuln/CVE-2021-30501"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2021-30501#Alpine:v3.23/upx","url":"https://osv.dev/vulnerability/ALPINE-CVE-2021-30501"}],"summary":"An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0. The flow allows attackers to cause a denial of service (abort) via a crafted file."}