{"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_01M5NEYWCV064TY01BRST1RK2E","modified_at":"2026-09-11T11:02:31.385424401Z","published_at":"2022-08-25T20:15:08.727Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-27801","https://security-tracker.debian.org/tracker/CVE-2020-27801"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-27801","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-27801"}],"summary":"A heap-based buffer over-read was discovered in the get_le64 function in bele.h in UPX 4.0.0 via a crafted Mach-O file."}