CVE-2020-35889
Memory safety violation in crayon
An issue was discovered in the crayon crate through 2020-08-31 for Rust. A TOCTOU issue has a resultant memory safety violation via HandleLike.
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 crayon crate through 2020-08-31 for Rust. A TOCTOU issue has a resultant memory safety violation via HandleLike.
- Record
CVE-2020-35889- 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-367
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the crayon crate through 2020-08-31 for Rust. A TOCTOU issue has a resultant memory safety violation via HandleLike.
- Record
CVE-2020-35889- Updated
- 2026-11-02
EUVDEUVD-2021-1793 No score
An issue was discovered in the crayon crate through 2020-08-31 for Rust. A TOCTOU issue has a resultant memory safety violation via HandleLike.
- Record
EUVD-2021-1793- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-m833-jv95-mfjh
Memory safety violation in crayon
An issue was discovered in the crayon crate through 2020-08-31 for Rust. A TOCTOU issue has a resultant memory safety violation via HandleLike.
- Record
GHSA-m833-jv95-mfjh- 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-367
- Updated
- 2026-11-02
OSV
An issue was discovered in the crayon crate through 2020-08-31 for Rust. A TOCTOU issue has a resultant memory safety violation via HandleLike.
- Record
CVE-2020-35889- 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
OSVGHSA-m833-jv95-mfjh
Memory safety violation in crayon
An issue was discovered in the crayon crate through 2020-08-31 for Rust. A TOCTOU issue has a resultant memory safety violation via HandleLike.
- Record
GHSA-m833-jv95-mfjh- 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-367
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0037
Misbehaving `HandleLike` implementation can lead to memory safety violation
Unsafe code in ObjectPool has time-of-check to time-of-use (TOCTOU) bug that
can eventually lead to a memory safety violation. ObjectPool and HandlePool
implicitly assumes that HandleLike trait methods are pure, i.e., they always
return the same value. However, this assumption is unsound since HandleLike
is a safe, public trait that allows a custom implementation.
- Record
RUSTSEC-2020-0037- 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 |
|---|---|---|
| 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-2020-35889 is a high vulnerability (CVSS 8.1) in Crayon Project Crayon, published August 31, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.88%, the 59th percentile. No source names a fixed version.