Rust advisories / v9
Vulnerability HighRUSTSEC-2020-0127 · v9
RUSTSEC-2020-0127: SyncRef's clone() and debug() allow data races
Short answerA security vulnerability in the v9 crate: SyncRef's clone() and debug() allow data races. High severity (CVSS 8.1). Fixed in 0.1.43: update to a fixed version.
| Crate | v9 |
|---|---|
| Type | Vulnerability (memory-corruption, thread-safety) |
| Affected versions | Before 0.1.43. |
| Fixed in | 0.1.43 |
| Severity | High, CVSS 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published | 2020-12-18 |
| Last changed | 2023-11-08 |
| Also known as | CVE-2020-36447, GHSA-3837-87vh-xq3w, GHSA-pfjq-935c-4895 |
What to do
- See which version you have:
cargo tree -i v9(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p v9. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for examplev9 = "0.1.43") or update the dependency that pulls it in. - Check again with
cargo audit, or paste your Cargo.lock into our Cargo.toml checker.
Details from the advisory
Affected versions of this crate unconditionally implement Sync for SyncRef<T>. This definition allows data races if &T is accessible through &SyncRef.
SyncRef<T> derives Clone and Debug, and the default implementations of those traits access &T by invoking T::clone() & T::fmt(). It is possible to create data races & undefined behavior by concurrently invoking SyncRef<T>::clone() or SyncRef<T>::fmt() from multiple threads with T: !Sync.
References
- Package: crates.io/crates/v9
- Advisory: rustsec.org/advisories/RUSTSEC-2020-0127.html
- Report: github.com/purpleposeidon/v9/issues/1
- Web: github.com/purpleposeidon/v9/commit/18847c50e5d36561cc91c996c3539ddb1eacf6c7
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
Up next
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