{"id":"CVE-2020-36437","aliases":["GHSA-368f-29c3-4f2r","RUSTSEC-2020-0117"],"url":"https://o3.security/vulnerability/CVE-2020-36437","summary":"Data race in conqueue","details":"Affected versions of this crate unconditionally implemented `Send`/`Sync` for `QueueSender<T>`, allowing to send non-Send `T` to other threads by invoking `(&QueueSender<T>).send()`.\n\nThis fails to prevent users from creating data races by sending types like `Rc<T>` or `Arc<Cell<T>>` to other threads, which can lead to memory corruption. The flaw was corrected in commit `1e462c3` by imposing `T: Send` to both `Send`/`Sync` impls for `QueueSender<T>`/`QueueReceiver<T>`.","published":"2021-08-08T06:15:07.003Z","modified":"2026-07-08T19:44:26.505404Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00847,"percentile":0.54485,"asOf":"2026-07-31"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"conqueue","fixedVersion":"0.4.0"}],"fix":{"url":"https://github.com/longshorej/conqueue/commit/1e462c32e7933821ddb26dc49fd4ffa5aeca97b8","label":"longshorej/conqueue@1e462c3"},"references":[{"type":"ADVISORY","url":"https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/conqueue/RUSTSEC-2020-0117.md"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2020-0117.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36437"},{"type":"WEB","url":"https://github.com/longshorej/conqueue/commit/1e462c32e7933821ddb26dc49fd4ffa5aeca97b8"},{"type":"PACKAGE","url":"https://github.com/longshorej/conqueue"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T19:44:26.505404Z"}}