CVE-2020-35862
Use after free and double free in bitvec
An issue was discovered in the bitvec crate before 0.17.4 for Rust. BitVec to BitBox conversion leads to a use-after-free or double free.
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 bitvec crate before 0.17.4 for Rust. BitVec to BitBox conversion leads to a use-after-free or double free.
- Record
CVE-2020-35862- 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
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-415, CWE-416
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the bitvec crate before 0.17.4 for Rust. BitVec to BitBox conversion leads to a use-after-free or double free.
- Record
CVE-2020-35862- Updated
- 2026-11-02
EUVDEUVD-2021-1617 No score
An issue was discovered in the bitvec crate before 0.17.4 for Rust. BitVec to BitBox conversion leads to a use-after-free or double free.
- Record
EUVD-2021-1617- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7cjc-hvxf-gqh7
Use after free and double free in bitvec
An issue was discovered in the bitvec crate before 0.17.4 for Rust. BitVec to BitBox conversion leads to a use-after-free or double free.
- Record
GHSA-7cjc-hvxf-gqh7- 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-415, CWE-416
- Updated
- 2026-11-02
OSVGHSA-7cjc-hvxf-gqh7
Use after free and double free in bitvec
An issue was discovered in the bitvec crate before 0.17.4 for Rust. BitVec to BitBox conversion leads to a use-after-free or double free.
- Record
GHSA-7cjc-hvxf-gqh7- 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-415, CWE-416
- Updated
- 2026-11-02
OSVRUSTSEC-2020-0007
use-after or double free of allocated memory
Conversion of BitVec to BitBox did not account for allocation movement.
The flaw was corrected by using the address after resizing, rather than the original base address.
- Record
RUSTSEC-2020-0007- 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
| Package | Affected | Fixed |
|---|---|---|
bitveccrates.io |
0.11.0 up to 0.17.4 | 0.17.4 |
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-2020-35862 is a critical vulnerability (CVSS 9.8) in Bitvec Project Bitvec, published March 27, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.65%, the 76th percentile. Fixed in bitvec 0.17.4.