{"action":"Upgrade upx-ucl to 4.2.2-1 or later.","affected":[{"fixed":"4.2.2-1","introduced":"0"}],"component":"upx-ucl","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.2.2-1"],"id":"tcs_01M5NFK8K2P1VDKBV86V2N9M16","modified_at":"2026-10-23T18:03:26.051087712Z","published_at":"2021-05-27T00:15:08.527Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-30501","https://security-tracker.debian.org/tracker/CVE-2021-30501"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-30501","url":"https://osv.dev/vulnerability/DEBIAN-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."}