{"id":"CVE-2020-35928","aliases":["EUVD-2021-1567","GHSA-4xj5-vv9x-63jp","RUSTSEC-2020-0092"],"status":"published","title":"Data races in concread","description":"An issue was discovered in the concread crate before 0.2.6 for Rust. Attackers can cause an ARCache\u003cK,V\u003e data race by sending types that do not implement Send/Sync.","severity":{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00245,"percentile":0.15852,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362"],"published":"2020-11-13T12:00:00Z","modified":"2026-11-09T10:45:19Z","fixes":[{"ecosystem":"crates.io","package":"concread","fixed_in":["0.2.6"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"concread","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.6"}]}]},{"source":"osv","ecosystem":"crates.io","package":"concread","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.2.6"}]}]},{"source":"osv","ecosystem":"crates.io","package":"concread","ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.2.6"}]}]}],"products":[{"vendor":"concread_project","product":"concread"}],"references":[{"url":"https://rustsec.org/advisories/RUSTSEC-2020-0092.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-35928","tags":["advisory"]},{"url":"https://github.com/kanidm/concread/issues/48","tags":["web","report"]},{"url":"https://github.com/advisories/GHSA-4xj5-vv9x-63jp"},{"url":"https://github.com/kanidm/concread","tags":["package"]},{"url":"https://crates.io/crates/concread","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-35928","description":"An issue was discovered in the concread crate before 0.2.6 for Rust. Attackers can cause an ARCache\u003cK,V\u003e data race by sending types that do not implement Send/Sync.","status":"published","published":"2020-12-31T08:16:02Z","modified":"2024-08-04T17:16:13.224Z","updated_at":"2026-11-02T14:35:57.975444Z"}],"euvd":[{"id":"EUVD-2021-1567","description":"An issue was discovered in the concread crate before 0.2.6 for Rust. Attackers can cause an ARCache\u003cK,V\u003e data race by sending types that do not implement Send/Sync.","status":"published","published":"2020-12-31T08:16:02Z","modified":"2024-08-04T17:16:13Z","updated_at":"2026-11-03T03:07:04.595509Z"}],"ghsa":[{"id":"GHSA-4xj5-vv9x-63jp","title":"Data races in concread","description":"An issue was discovered in the concread crate before 0.2.6 for Rust. Attackers can cause an ARCache\u003cK,V\u003e data race by sending types that do not implement Send/Sync.","status":"published","published":"2021-08-25T20:50:22Z","modified":"2023-01-11T05:05:39Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:36:12.361159Z"}],"nvd":[{"id":"CVE-2020-35928","description":"An issue was discovered in the concread crate before 0.2.6 for Rust. Attackers can cause an ARCache\u003cK,V\u003e data race by sending types that do not implement Send/Sync.","status":"published","published":"2020-12-31T09:15:16.507Z","modified":"2026-06-17T03:14:37.463Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":1.9,"vector":"AV:L/AC:M/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:06:28.340168Z"}],"osv":[{"id":"CVE-2020-35928","description":"An issue was discovered in the concread crate before 0.2.6 for Rust. Attackers can cause an ARCache\u003cK,V\u003e data race by sending types that do not implement Send/Sync.","status":"published","published":"2020-12-31T09:15:16.507Z","modified":"2026-11-10T02:30:43.589298197Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-09T10:53:57.550641Z"},{"id":"GHSA-4xj5-vv9x-63jp","title":"Data races in concread","description":"An issue was discovered in the concread crate before 0.2.6 for Rust. Attackers can cause an ARCache\u003cK,V\u003e data race by sending types that do not implement Send/Sync.","status":"published","published":"2021-08-25T20:50:22Z","modified":"2023-11-08T04:03:39.892156Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:46:37.528068Z"},{"id":"RUSTSEC-2020-0092","title":"Send/Sync bound needed on V in `impl Send/Sync for ARCache\u003cK, V\u003e`","description":"Affected versions of this crate unconditionally implemented `Send`/`Sync` traits for `ARCache\u003cK, V\u003e` type.\n\nThis allows users to send/access types that do not implement `Send`/`Sync`, which can cause a data race.\n\nThe flaw was corrected in the 0.2.6 release by adding bounds `K: Send + Sync` \u0026 `V: Send + Sync` to affected `Send`/`Sync` trait implementations.","status":"published","published":"2020-11-13T12:00:00Z","modified":"2023-11-08T04:03:39.892156Z","cvss":[{"version":"3.1","score":4.7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:39.492624Z"}]}}