{"id":"CVE-2020-36451","aliases":["EUVD-2021-1593","GHSA-686h-j8r8-wmfm","RUSTSEC-2020-0131"],"status":"published","title":"Data races in rcu_cell","description":"An issue was discovered in the rcu_cell crate through 2020-11-14 for Rust. There are unconditional implementations of Send and Sync for RcuCell\u003cT\u003e.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01249,"percentile":0.69756,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362","CWE-77"],"published":"2020-11-14T12:00:00Z","modified":"2026-06-17T03:15:31Z","fixes":[{"ecosystem":"crates.io","package":"rcu_cell","fixed_in":["0.1.9"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"rcu_cell","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.1.9"}]}]},{"source":"osv","ecosystem":"crates.io","package":"rcu_cell","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.1.9"}]}]},{"source":"osv","ecosystem":"crates.io","package":"rcu_cell","ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"}]}]}],"products":[{"vendor":"rcu_cell_project","product":"rcu_cell"}],"references":[{"url":"https://rustsec.org/advisories/RUSTSEC-2020-0131.html","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory","web","advisory"]},{"url":"https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/rcu_cell/RUSTSEC-2020-0131.md","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36451","tags":["advisory"]},{"url":"https://github.com/Xudong-Huang/rcu_cell/issues/3","tags":["web","report"]},{"url":"https://github.com/Xudong-Huang/rcu_cell/pull/4","tags":["web"]},{"url":"https://github.com/Xudong-Huang/rcu_cell/pull/4/commits/1faf18eee11f14969b77ae0f76dcd9ebd437d0c2","tags":["web"]},{"url":"https://github.com/advisories/GHSA-686h-j8r8-wmfm"},{"url":"https://github.com/Xudong-Huang/rcu_cell","tags":["package"]},{"url":"https://crates.io/crates/rcu_cell","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-36451","description":"An issue was discovered in the rcu_cell crate through 2020-11-14 for Rust. There are unconditional implementations of Send and Sync for RcuCell\u003cT\u003e.","status":"published","published":"2021-08-08T05:15:22Z","modified":"2024-08-04T17:30:07.974Z","updated_at":"2026-11-02T14:35:55.128961Z"}],"euvd":[{"id":"EUVD-2021-1593","description":"An issue was discovered in the rcu_cell crate through 2020-11-14 for Rust. There are unconditional implementations of Send and Sync for RcuCell\u003cT\u003e.","status":"published","published":"2021-08-08T05:15:22Z","modified":"2024-08-04T17:30:07Z","updated_at":"2026-11-03T03:07:03.010139Z"}],"ghsa":[{"id":"GHSA-686h-j8r8-wmfm","title":"Data races in rcu_cell","description":"Affected versions of this crate unconditionally implement Send/Sync for `RcuCell\u003cT\u003e`.\nThis allows users to send `T: !Send` to other threads (while `T` enclosed within `RcuCell\u003cT\u003e`), and allows users to concurrently access `T: !Sync` by using the APIs of `RcuCell\u003cT\u003e` that provide access to `\u0026T`.\n\nThis can result in memory corruption caused by data races.","status":"published","published":"2021-08-25T20:57:14Z","modified":"2023-02-01T05:05:56Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-77","CWE-362"],"updated_at":"2026-11-02T14:36:36.66596Z"}],"nvd":[{"id":"CVE-2020-36451","description":"An issue was discovered in the rcu_cell crate through 2020-11-14 for Rust. There are unconditional implementations of Send and Sync for RcuCell\u003cT\u003e.","status":"published","published":"2021-08-08T06:15:07.547Z","modified":"2026-06-17T03:15:31.2Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T14:06:44.292752Z"}],"osv":[{"id":"GHSA-686h-j8r8-wmfm","title":"Data races in rcu_cell","description":"Affected versions of this crate unconditionally implement Send/Sync for `RcuCell\u003cT\u003e`.\nThis allows users to send `T: !Send` to other threads (while `T` enclosed within `RcuCell\u003cT\u003e`), and allows users to concurrently access `T: !Sync` by using the APIs of `RcuCell\u003cT\u003e` that provide access to `\u0026T`.\n\nThis can result in memory corruption caused by data races.","status":"published","published":"2021-08-25T20:57:14Z","modified":"2023-11-08T04:03:45.64306Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-362","CWE-77"],"updated_at":"2026-11-02T15:46:39.266402Z"},{"id":"RUSTSEC-2020-0131","title":"Send/Sync bound needed on T  for Send/Sync impl of RcuCell\u003cT\u003e","description":"Affected versions of this crate unconditionally implement Send/Sync for `RcuCell\u003cT\u003e`.\nThis allows users to send `T: !Send` to other threads (while `T` enclosed within `RcuCell\u003cT\u003e`), and allows users to concurrently access `T: !Sync` by using the APIs of `RcuCell\u003cT\u003e` that provide access to `\u0026T`.\n\nThis can result in memory corruption caused by data races.","status":"published","published":"2020-11-14T12:00:00Z","modified":"2023-11-08T04:03:45.64306Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:39.492624Z"}]}}