GHSA-74r5-g7vc-j2v2
zerovec-derive incorrectly uses `#[repr(packed)]`
The affected versions make unsafe memory accesses under the assumption that #[repr(packed)] has a guaranteed field order.
The Rust specification does not guarantee this, and https://github.com/rust-lang/rust/pull/125360 (1.80.0-beta) starts
reordering fields of #[repr(packed)] structs, leading to illegal memory accesses.
The patched versions 0.9.7 and 0.10.3 use #[repr(C, packed)], which guarantees field order.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
What each source reports
GitHub Advisories Score used
zerovec-derive incorrectly uses `#[repr(packed)]`
The affected versions make unsafe memory accesses under the assumption that #[repr(packed)] has a guaranteed field order.
The Rust specification does not guarantee this, and https://github.com/rust-lang/rust/pull/125360 (1.80.0-beta) starts
reordering fields of #[repr(packed)] structs, leading to illegal memory accesses.
The patched versions 0.9.7 and 0.10.3 use #[repr(C, packed)], which guarantees field order.
- Record
GHSA-74r5-g7vc-j2v2- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 6.2 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-120
- Updated
- 2026-11-02
OSV
zerovec-derive incorrectly uses `#[repr(packed)]`
The affected versions make unsafe memory accesses under the assumption that #[repr(packed)] has a guaranteed field order.
The Rust specification does not guarantee this, and https://github.com/rust-lang/rust/pull/125360 (1.80.0-beta) starts
reordering fields of #[repr(packed)] structs, leading to illegal memory accesses.
The patched versions 0.9.7 and 0.10.3 use #[repr(C, packed)], which guarantees field order.
- Record
GHSA-74r5-g7vc-j2v2- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 6.2 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-120
- Updated
- 2026-11-02
OSVRUSTSEC-2024-0346No score
Incorrect usage of `#[repr(packed)]`
The affected versions make unsafe memory accesses under the assumption that #[repr(packed)] has a guaranteed field order.
The Rust specification does not guarantee this, and https://github.com/rust-lang/rust/pull/125360 (1.80.0-beta) starts
reordering fields of #[repr(packed)] structs, leading to illegal memory accesses.
The patched versions 0.9.7 and 0.10.3 use #[repr(C, packed)], which guarantees field order.
- Record
RUSTSEC-2024-0346- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
zerovec-derivecrates.io | before 0.9.7 | 0.9.7 |
zerovec-derivecrates.io | 0.10.0 up to 0.10.3 | 0.10.3 |
zerovec-derivecrates.io | 0.0.0-0 up to 0.9.7, 0.10.0 up to 0.10.3 | 0.9.70.10.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-74r5-g7vc-j2v2 is a medium vulnerability (CVSS 6.9) in zerovec-derive, published July 1, 2024. No source lists public exploit code. Fixed in zerovec-derive 0.9.7.