{"id":"RUSTSEC-2022-0041","summary":"Unsoundness of AtomicCell\u003c*64\u003e arithmetics on 32-bit targets that support Atomic*64","details":"## Impact\n\nAffected versions of this crate incorrectly assumed that the alignment of {i,u}64 was always the same as Atomic{I,U}64.\n\nHowever, the alignment of {i,u}64 on a 32-bit target can be smaller than Atomic{I,U}64.\n\nThis can cause the following problems:\n\n- Unaligned memory accesses\n- Data race\n\nCrates using fetch_* methods with AtomicCell\u003c{i,u}64\u003e are affected by this issue.\n\n32-bit targets without Atomic{I,U}64 and 64-bit targets are not affected by this issue.\n\n32-bit targets with Atomic{I,U}64 and {i,u}64 have the same alignment are also not affected by this issue.\n\nThe following is a complete list of the builtin targets that may be affected. (last update: nightly-2022-02-11)\n\n- armv7-apple-ios (tier 3)\n- armv7s-apple-ios (tier 3)\n- i386-apple-ios (tier 3)\n- i586-unknown-linux-gnu\n- i586-unknown-linux-musl\n- i686-apple-darwin (tier 3)\n- i686-linux-android\n- i686-unknown-freebsd\n- i686-unknown-haiku (tier 3)\n- i686-unknown-linux-gnu\n- i686-unknown-linux-musl\n- i686-unknown-netbsd (tier 3)\n- i686-unknown-openbsd (tier 3)\n- i686-wrs-vxworks (tier 3)\n\n([script to get list](https://gist.github.com/taiki-e/3c7891e8c5f5e0cbcb44d7396aabfe10))\n\n## Patches\n\nThis has been fixed in crossbeam-utils 0.8.7.\n\nAffected 0.8.x releases have been yanked.\n\nThanks to @taiki-e","aliases":["CVE-2022-23639","GHSA-qc84-gqf4-9926"],"modified":"2023-11-08T04:08:26.111544Z","published":"2022-02-05T12:00:00Z","database_specific":{"license":"CC0-1.0"},"references":[{"type":"PACKAGE","url":"https://crates.io/crates/crossbeam-utils"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2022-0041.html"},{"type":"WEB","url":"https://github.com/crossbeam-rs/crossbeam/pull/781"}],"affected":[{"package":{"name":"crossbeam-utils","ecosystem":"crates.io","purl":"pkg:cargo/crossbeam-utils"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.8.7"}]}],"ecosystem_specific":{"affects":{"arch":[],"functions":[],"os":[]},"affected_functions":null},"database_specific":{"categories":["memory-corruption"],"source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2022-0041.json","cvss":null,"informational":"unsound"}}],"schema_version":"1.7.3"}