{"id":"RUSTSEC-2026-0204","summary":"Invalid pointer dereference in `fmt::Pointer` impl for `Atomic` and `Shared` when the underlying pointer is invalid","details":"Affected versions of `fmt::Display` dereference the underlying pointer. This causes a invalid pointer dereference e.g., when a pointer created with `Atomic::null` or `Shared::null`. `fmt::Debug` impls and pre-0.9 `fmt::Display` impls, which do not dereference pointers, are not affected by this issue.","modified":"2026-07-06T22:30:04.159269138Z","published":"2026-07-06T12:00:00Z","database_specific":{"license":"CC0-1.0"},"references":[{"type":"PACKAGE","url":"https://crates.io/crates/crossbeam-epoch"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2026-0204.html"},{"type":"WEB","url":"https://github.com/crossbeam-rs/crossbeam/pull/1276"}],"affected":[{"package":{"name":"crossbeam-epoch","ecosystem":"crates.io","purl":"pkg:cargo/crossbeam-epoch"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.9.0"},{"fixed":"0.9.20"}]}],"ecosystem_specific":{"affects":{"os":[],"functions":[],"arch":[]},"affected_functions":null},"database_specific":{"informational":null,"categories":[],"cvss":null,"source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0204.json"}}],"schema_version":"1.7.5"}