{"action":"Upgrade lz4 to 1.9.3-2 or later.","affected":[{"fixed":"1.9.3-2","introduced":"0"}],"component":"lz4","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1.9.3-2"],"id":"tcs_01M5NFS3BQ2YAT2TSMY9MDJ425","modified_at":"2026-10-15T09:47:44.670699145Z","published_at":"2021-06-02T13:15:13.170Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-3520","https://security-tracker.debian.org/tracker/CVE-2021-3520"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-3520","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-3520"}],"summary":"There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument,"}