CVE-2020-36219
Data race in atomic-option
An issue was discovered in the atomic-option crate through 2020-10-31 for Rust. Because AtomicOption<T> implements Sync unconditionally, a data race can occur.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the atomic-option crate through 2020-10-31 for Rust. Because AtomicOption<T> implements Sync unconditionally, a data race can occur.
- Record
CVE-2020-36219- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
An issue was discovered in the atomic-option crate through 2020-10-31 for Rust. Because AtomicOption<T> implements Sync unconditionally, a data race can occur.
- Record
CVE-2020-36219- Updated
- 2026-11-02
EUVDEUVD-2021-1638 No score
An issue was discovered in the atomic-option crate through 2020-10-31 for Rust. Because AtomicOption<T> implements Sync unconditionally, a data race can occur.
- Record
EUVD-2021-1638- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8gf5-q9p9-wvmc
Data race in atomic-option
An issue was discovered in the atomic-option crate through 2020-10-31 for Rust. Because AtomicOption<T> implements Sync unconditionally, a data race can occur.
- Record
GHSA-8gf5-q9p9-wvmc- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-662
- Updated
- 2026-11-02
OSVGHSA-8gf5-q9p9-wvmc
Data race in atomic-option
An issue was discovered in the atomic-option crate through 2020-10-31 for Rust. Because AtomicOption<T> implements Sync unconditionally, a data race can occur.
- Record
GHSA-8gf5-q9p9-wvmc- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-662
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0113
AtomicOption should have Send + Sync bound on its type argument.
In the affected versions of this crate,
AtomicOption<T> unconditionally implements Sync.
This allows programmers to move non-Sync types across thread boundaries (e.g. Rc<T>, Arc<Cell<T>>), which can lead to data races and undefined behavior.
It is also possible to send non-Send types like std::sync::MutexGuard to other threads, which can lead to undefined behavior.
- Record
RUSTSEC-2020-0113- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
atomic-optioncrates.io |
through 0.1.2 | None known |
atomic-optioncrates.io |
0.0.0-0 and later | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-36219 is a medium vulnerability (CVSS 5.9) in Atomic-option Project Atomic-option, published October 31, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.12%, the 66th percentile. No source names a fixed version.