{"id":"CVE-2020-25576","aliases":["GHSA-mmc9-pwm7-qj5w","RUSTSEC-2019-0035"],"url":"https://o3.security/vulnerability/CVE-2020-25576","summary":"Unaligned memory access in rand_core","details":"An issue was discovered in the rand_core crate before 0.4.2 for Rust. Casting of byte slices to integer slices mishandles alignment constraints.","published":"2020-09-14T19:15:11.473Z","modified":"2026-08-21T17:13:42.497411Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.01558,"percentile":0.72883,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"rand_core","fixedVersion":"0.4.2"},{"ecosystem":"crates.io","name":"rand_core","fixedVersion":"0.3.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2019-0035.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-21T17:13:42.497411Z"}}