CVE-2020-35895
Out-of-bounds write in stack
An issue was discovered in the stack crate before 0.3.1 for Rust. ArrayVec has an out-of-bounds write via element insertion.
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
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the stack crate before 0.3.1 for Rust. ArrayVec has an out-of-bounds write via element insertion.
- Record
CVE-2020-35895- 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 - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the stack crate before 0.3.1 for Rust. ArrayVec has an out-of-bounds write via element insertion.
- Record
CVE-2020-35895- Updated
- 2026-11-02
EUVDEUVD-2021-1737 No score
An issue was discovered in the stack crate before 0.3.1 for Rust. ArrayVec has an out-of-bounds write via element insertion.
- Record
EUVD-2021-1737- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-h45v-vgvp-3h5v
Out-of-bounds write in stack
ArrayVec::insert allows insertion of an element into the array object into the specified index. Due to a missing check on the upperbound of this index, it is possible to write out of bounds.
- Record
GHSA-h45v-vgvp-3h5v- 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-787
- Updated
- 2026-11-02
OSV
An issue was discovered in the stack crate before 0.3.1 for Rust. ArrayVec has an out-of-bounds write via element insertion.
- Record
CVE-2020-35895- 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-h45v-vgvp-3h5v
Out-of-bounds write in stack
ArrayVec::insert allows insertion of an element into the array object into the specified index. Due to a missing check on the upperbound of this index, it is possible to write out of bounds.
- Record
GHSA-h45v-vgvp-3h5v- 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-787
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0042
Missing check in ArrayVec leads to out-of-bounds write.
ArrayVec::insert allows insertion of an element into the array object into the specified index. Due to a missing check on the upperbound of this index, it is possible to write out of bounds.
- Record
RUSTSEC-2020-0042- 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
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-2020-35895 is a critical vulnerability (CVSS 9.8) in Stack Project Stack, published September 24, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.87%, the 79th percentile. Fixed in stack 0.3.1.