{"id":"RUSTSEC-2026-0451","summary":"Degraded secret zeroization capabilities","details":"In version 0.11.1 and earlier of vodozemac, the Olm root key ratchet did not\nzeroize its HKDF output after use. Each ratchet step left a copy of the new root\nkey and chain key in freed heap memory.\n\n## Impact\n\nAn attacker who can read the process's memory, for example through a separate\nmemory-disclosure bug, a core dump, or swapped-out pages, may recover root keys\nand chain keys from earlier ratchet steps. A leaked chain key allows decrypting\nthe messages in that chain, weakening Olm's forward secrecy for affected\nsessions.","aliases":["GHSA-v27v-f96q-qhjq"],"modified":"2026-11-06T15:45:02.403869632Z","published":"2026-11-06T12:00:00Z","database_specific":{"license":"CC0-1.0"},"references":[{"type":"PACKAGE","url":"https://crates.io/crates/vodozemac"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2026-0451.html"},{"type":"WEB","url":"https://github.com/matrix-org/vodozemac/pull/446"}],"affected":[{"package":{"name":"vodozemac","ecosystem":"crates.io","purl":"pkg:cargo/vodozemac"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.11.2"}]}],"ecosystem_specific":{"affects":{"functions":[],"arch":[],"os":[]},"affected_functions":null},"database_specific":{"cvss":null,"source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0451.json","informational":null,"categories":["memory-exposure"]}}],"schema_version":"1.9.2"}