CVE-2020-36454
Data races in parc
An issue was discovered in the parc crate through 2020-11-14 for Rust. LockWeak<T> has an unconditional implementation of Send without trait bounds on T.
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
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the parc crate through 2020-11-14 for Rust. LockWeak<T> has an unconditional implementation of Send without trait bounds on T.
- Record
CVE-2020-36454- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-362
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the parc crate through 2020-11-14 for Rust. LockWeak<T> has an unconditional implementation of Send without trait bounds on T.
- Record
CVE-2020-36454- Updated
- 2026-11-02
EUVDEUVD-2021-1509 No score
An issue was discovered in the parc crate through 2020-11-14 for Rust. LockWeak<T> has an unconditional implementation of Send without trait bounds on T.
- Record
EUVD-2021-1509- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-29v7-3v4c-gf38
Data races in parc
In the affected versions of this crate, LockWeak<T> unconditionally implemented Send with no trait bounds on T. LockWeak<T> doesn't own T and only provides &T. This allows concurrent access to a non-Sync T, which can cause undefined behavior like data races.
- Record
GHSA-29v7-3v4c-gf38- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119, CWE-362
- Updated
- 2026-11-02
GitHub AdvisoriesGHSA-xwxc-j97j-84gf
Race condition in Parc
In the affected versions of this crate, LockWeak<T> unconditionally implemented Send with no trait bounds on T. LockWeak<T> doesn't own T and only provides &T. This allows concurrent access to a non-Sync T, which can cause undefined behavior like data races.
- Record
GHSA-xwxc-j97j-84gf- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-362
- Updated
- 2026-11-02
OSVGHSA-29v7-3v4c-gf38
Data races in parc
In the affected versions of this crate, LockWeak<T> unconditionally implemented Send with no trait bounds on T. LockWeak<T> doesn't own T and only provides &T. This allows concurrent access to a non-Sync T, which can cause undefined behavior like data races.
- Record
GHSA-29v7-3v4c-gf38- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119, CWE-362
- Updated
- 2026-11-02
OSVGHSA-xwxc-j97j-84gf
Race condition in Parc
In the affected versions of this crate, LockWeak<T> unconditionally implemented Send with no trait bounds on T. LockWeak<T> doesn't own T and only provides &T. This allows concurrent access to a non-Sync T, which can cause undefined behavior like data races.
- Record
GHSA-xwxc-j97j-84gf- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-362
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0134
`LockWeak<T>` allows to create data race to `T`.
In the affected versions of this crate, LockWeak<T> unconditionally implemented Send with no trait bounds on T. LockWeak<T> doesn't own T and only provides &T.
This allows concurrent access to a non-Sync T, which can cause undefined behavior like data races.
- Record
RUSTSEC-2020-0134- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| 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-2020-36454 is a high vulnerability (CVSS 8.1) in Parc Project Parc, published November 14, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.83%, the 58th percentile. No source names a fixed version.
References
rustsec.org/advisories/RUSTSEC-2020-0134.html
raw.githubusercontent.com/rustsec/advisory-db/main/crates/parc/RUSTSEC-2020-0134.md
nvd.nist.gov/vuln/detail/CVE-2020-36454
github.com/hyyking/rustracts/pull/6
crates.io/crates/parc