CVE-2021-29931
Double free in arenavec
An issue was discovered in the arenavec crate through 2021-01-12 for Rust. A double drop can sometimes occur upon a panic in T::drop().
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 arenavec crate through 2021-01-12 for Rust. A double drop can sometimes occur upon a panic in T::drop().
- Record
CVE-2021-29931- 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-415
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the arenavec crate through 2021-01-12 for Rust. A double drop can sometimes occur upon a panic in T::drop().
- Record
CVE-2021-29931- Updated
- 2026-11-02
EUVDEUVD-2021-1650 No score
An issue was discovered in the arenavec crate through 2021-01-12 for Rust. A double drop can sometimes occur upon a panic in T::drop().
- Record
EUVD-2021-1650- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-955p-rc5h-hg6h
Double free in arenavec
Affected versions of this crate did not guard against potential panics that may happen from user-provided functions T::default() and T::drop().
Panic within T::default() leads to dropping uninitialized T, when it is invoked from common::Slice::<T, H>::new(). Panic within T::drop() leads to double drop of T, when it is invoked either from common::SliceVec::<T, H>::resize_with() or common::SliceVec::<T, H>::resize()
Either case causes memory corruption in the heap memory.
- Record
GHSA-955p-rc5h-hg6h- 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-415
- Updated
- 2026-11-02
OSVGHSA-327x-39hh-65wf
Out of bounds write in arenavec
An issue was discovered in the arenavec crate through 0.1.1. A drop of uninitialized memory can sometimes occur upon a panic in T::default()
- Record
GHSA-327x-39hh-65wf- 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-787
- Updated
- 2026-11-02
OSVGHSA-955p-rc5h-hg6h
Double free in arenavec
Affected versions of this crate did not guard against potential panics that may happen from user-provided functions T::default() and T::drop().
Panic within T::default() leads to dropping uninitialized T, when it is invoked from common::Slice::<T, H>::new(). Panic within T::drop() leads to double drop of T, when it is invoked either from common::SliceVec::<T, H>::resize_with() or common::SliceVec::<T, H>::resize()
Either case causes memory corruption in the heap memory.
- Record
GHSA-955p-rc5h-hg6h- 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-415
- Updated
- 2026-11-02
OSVRUSTSEC-2021-0040
panic safety: double drop or uninitialized drop of T upon panic
Affected versions of this crate did not guard against potential panics that may happen from user-provided functions T::default() and T::drop().
Panic within T::default() leads to dropping uninitialized T, when it is invoked from common::Slice::<T, H>::new().
Panic within T::drop() leads to double drop of T, when it is invoked either from common::SliceVec::<T, H>::resize_with() or common::SliceVec::<T, H>::resize()
Either case causes memory corruption in the heap memory.
- Record
RUSTSEC-2021-0040- 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
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-2021-29931 is a high vulnerability (CVSS 7.5) in Arenavec Project Arenavec, published January 12, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.01%, the 63rd percentile. No source names a fixed version.