CVE-2020-36215
Data races in hashconsing
An issue was discovered in the hashconsing crate before 1.1.0 for Rust. Because HConsed does not have bounds on its Send trait or Sync trait, memory corruption can occur.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- 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 hashconsing crate before 1.1.0 for Rust. Because HConsed does not have bounds on its Send trait or Sync trait, memory corruption can occur.
- Record
CVE-2020-36215- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-662, CWE-787
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the hashconsing crate before 1.1.0 for Rust. Because HConsed does not have bounds on its Send trait or Sync trait, memory corruption can occur.
- Record
CVE-2020-36215- Updated
- 2026-11-02
EUVDEUVD-2021-1877 No score
An issue was discovered in the hashconsing crate before 1.1.0 for Rust. Because HConsed does not have bounds on its Send trait or Sync trait, memory corruption can occur.
- Record
EUVD-2021-1877- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rw2c-c256-3r53
Data races in hashconsing
Affected versions of hashconsing implements Send/Sync for its HConsed type without restricting it to Sendable types and Syncable types. This allows non-Sync types such as Cell to be shared across threads leading to undefined behavior and memory corruption in concurrent programs.
- Record
GHSA-rw2c-c256-3r53- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-662, CWE-787
- Updated
- 2026-11-02
OSVGHSA-rw2c-c256-3r53
Data races in hashconsing
Affected versions of hashconsing implements Send/Sync for its HConsed type without restricting it to Sendable types and Syncable types. This allows non-Sync types such as Cell to be shared across threads leading to undefined behavior and memory corruption in concurrent programs.
- Record
GHSA-rw2c-c256-3r53- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-662, CWE-787
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0107
hashconsing's HConsed lacks Send/Sync bound for its Send/Sync trait.
Affected versions of hashconsing implements Send/Sync for its HConsed type without restricting it to Sendable types and Syncable types.
This allows non-Sync types such as Cell to be shared across threads leading to undefined behavior and memory corruption in concurrent programs.
- Record
RUSTSEC-2020-0107- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
hashconsingcrates.io |
before 1.1.0 | 1.1.0 |
hashconsingcrates.io |
0.0.0-0 up to 1.1.0 | 1.1.0 |
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-2020-36215 is a high vulnerability (CVSS 7.5) in Hashconsing Project Hashconsing, published November 10, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.38%, the 72nd percentile. Fixed in hashconsing 1.1.0.