CVE-2020-35886
Multiple security issues including data race, buffer overflow, and uninitialized memory drop in arr
An issue was discovered in the arr crate through 2020-08-25 for Rust. An attacker can smuggle non-Sync/Send types across a thread boundary to cause a data race.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- 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 arr crate through 2020-08-25 for Rust. An attacker can smuggle non-Sync/Send types across a thread boundary to cause a data race.
- Record
CVE-2020-35886- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 1.9 Low
AV:L/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-362
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the arr crate through 2020-08-25 for Rust. An attacker can smuggle non-Sync/Send types across a thread boundary to cause a data race.
- Record
CVE-2020-35886- Updated
- 2026-11-02
EUVDEUVD-2021-1675 No score
An issue was discovered in the arr crate through 2020-08-25 for Rust. An attacker can smuggle non-Sync/Send types across a thread boundary to cause a data race.
- Record
EUVD-2021-1675- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c7fw-cr3w-wvfc
Multiple security issues including data race, buffer overflow, and uninitialized memory drop in arr
arr crate contains multiple security issues. Specifically,
- It incorrectly implements Sync/Send bounds, which allows to smuggle non-Sync/Send types across the thread boundary.
- Index and IndexMut implementation does not check the array bound.
- Array::new_from_template() drops uninitialized memory.
- Record
GHSA-c7fw-cr3w-wvfc- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-362
- Updated
- 2026-11-02
OSVCVE-2020-35887
An issue was discovered in the arr crate through 2020-08-25 for Rust. There is a buffer overflow in Index and IndexMut.
- Record
CVE-2020-35887- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-36xw-hgfv-jwm7
Multiple security issues including data race, buffer overflow, and uninitialized memory drop in arr
arr crate contains multiple security issues. Specifically,
- It incorrectly implements Sync/Send bounds, which allows to smuggle non-Sync/Send types across the thread boundary.
- Index and IndexMut implementation does not check the array bound.
- Array::new_from_template() drops uninitialized memory.
- Record
GHSA-36xw-hgfv-jwm7- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-908
- Updated
- 2026-11-02
OSVGHSA-c7fw-cr3w-wvfc
Multiple security issues including data race, buffer overflow, and uninitialized memory drop in arr
arr crate contains multiple security issues. Specifically,
- It incorrectly implements Sync/Send bounds, which allows to smuggle non-Sync/Send types across the thread boundary.
- Index and IndexMut implementation does not check the array bound.
- Array::new_from_template() drops uninitialized memory.
- Record
GHSA-c7fw-cr3w-wvfc- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-362
- Updated
- 2026-11-02
OSVGHSA-fhvj-7f9p-w788
Multiple security issues including data race, buffer overflow, and uninitialized memory drop in arr
arr crate contains multiple security issues. Specifically,
- It incorrectly implements Sync/Send bounds, which allows to smuggle non-Sync/Send types across the thread boundary.
- Index and IndexMut implementation does not check the array bound.
- Array::new_from_template() drops uninitialized memory.
- Record
GHSA-fhvj-7f9p-w788- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-120
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0034 No score
Multiple security issues including data race, buffer overflow, and uninitialized memory drop
arr crate contains multiple security issues. Specifically,
- It incorrectly implements Sync/Send bounds, which allows to smuggle non-Sync/Send types across the thread boundary.
IndexandIndexMutimplementation does not check the array bound.Array::new_from_template()drops uninitialized memory.
- Record
RUSTSEC-2020-0034- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, 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-2020-35886 is a medium vulnerability (CVSS 4.7) in Arr Project Arr, published August 25, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 9th percentile. No source names a fixed version.