CVE-2021-38190
Out of bounds write in nalgebra
An issue was discovered in the nalgebra crate before 0.27.1 for Rust. It allows out-of-bounds memory access because it does not ensure that the number of elements is equal to the product of the row count and column count.
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
9.8
An issue was discovered in the nalgebra crate before 0.27.1 for Rust. It allows out-of-bounds memory access because it does not ensure that the number of elements is equal to the product of the row count and column count.
- Record
CVE-2021-38190- 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-119
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in the nalgebra crate before 0.27.1 for Rust. It allows out-of-bounds memory access because it does not ensure that the number of elements is equal to the product of the row count and column count.
- Record
CVE-2021-38190- Updated
- 2026-11-02
EUVDEUVD-2021-1552 No score
An issue was discovered in the nalgebra crate before 0.27.1 for Rust. It allows out-of-bounds memory access because it does not ensure that the number of elements is equal to the product of the row count and column count.
- Record
EUVD-2021-1552- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3w8g-xr3f-2mp8
9.8
Out of bounds write in nalgebra
The Deserialize implementation for VecStorage did not maintain the invariant that the number of elements must equal nrows * ncols. Deserialization of specially crafted inputs could allow memory access beyond allocation of the vector.
This flaw was introduced in v0.11.0 (086e6e) due to the addition of an automatically derived implementation of Deserialize for MatrixVec. MatrixVec was later renamed to VecStorage in v0.16.13 (0f66403) and continued to use the automatically derived implementation of Deserialize.
- Record
GHSA-3w8g-xr3f-2mp8- 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-119, CWE-787
- Updated
- 2026-11-02
OSVAZL-41989
9.8
CVE-2021-38190 affecting package librsvg2 for versions less than 2.58.1-1
An issue was discovered in the nalgebra crate before 0.27.1 for Rust. It allows out-of-bounds memory access because it does not ensure that the number of elements is equal to the product of the row count and column count.
- Record
AZL-41989- 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-3w8g-xr3f-2mp8
9.8
Out of bounds write in nalgebra
The Deserialize implementation for VecStorage did not maintain the invariant that the number of elements must equal nrows * ncols. Deserialization of specially crafted inputs could allow memory access beyond allocation of the vector.
This flaw was introduced in v0.11.0 (086e6e) due to the addition of an automatically derived implementation of Deserialize for MatrixVec. MatrixVec was later renamed to VecStorage in v0.16.13 (0f66403) and continued to use the automatically derived implementation of Deserialize.
- Record
GHSA-3w8g-xr3f-2mp8- 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-119, CWE-787
- Updated
- 2026-11-02
OSVRUSTSEC-2021-0070 No score
VecStorage Deserialize Allows Violation of Length Invariant
The Deserialize implementation for VecStorage did not maintain the invariant that the number of elements must equal nrows * ncols. Deserialization of specially crafted inputs could allow memory access beyond allocation of the vector.
This flaw was introduced in v0.11.0 (086e6e) due to the addition of an automatically derived implementation of Deserialize for MatrixVec. MatrixVec was later renamed to VecStorage in v0.16.13 (0f66403) and continued to use the automatically derived implementation of Deserialize.
This flaw was corrected in commit 5bff536 by returning an error during deserialization if the number of elements does not exactly match the expected size.
- Record
RUSTSEC-2021-0070- 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-2021-38190 is a critical vulnerability (CVSS 9.8) in Dimforge Nalgebra, published June 6, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.41%, the 72nd percentile. Fixed in nalgebra 0.27.1.
References
rustsec.org/advisories/RUSTSEC-2021-0070.html
raw.githubusercontent.com/rustsec/advisory-db/main/crates/nalgebra/RUSTSEC-2021-0070.md
nvd.nist.gov/vuln/detail/CVE-2021-38190
github.com/dimforge/nalgebra/issues/883
github.com/dimforge/nalgebra/pull/889
github.com/dimforge/nalgebra/commit/a803271fcce75b7c151e92aa099dfa546db4adc5