🛡️ RUSTSEC-2025-0166 — stackvector

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Multiple soundness issues in stackvector

Affected versions of stackvector contained multiple soundness issues that could allow safe Rust code to trigger undefined behavior.

One issue was that StackVec::length was exposed as a public field. Safe Rust code could set length to a value larger than the backing array capacity. Other safe methods, including remove, pop, and truncate, relied on length before performing unsafe pointer operations (ptr::read, ptr::copy, offset/add). If length was corrupted by safe code, these methods could perform out-of-bounds pointer arithmetic, reads, writes, or copies.

The upstream maintainer also identified additional soundness issues, including the use of mem::uninitialized in StackVec::from_vec_unchecked, which was reachable through from_vec, and Miri violations related to MaybeUninit usage.

Version 2.0.0 was released to fix the known soundness issues.

Affected software

RUSTSEC-2025-0166 is recorded against 1 package.

  • stackvector

Timeline and source

Published on 23 October 2025 and last revised on 2 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

crates.io (Package)
rustsec.org (Advisory)
github.com (Report)
github.com (Web)
github.com (Web)
github.com (Report)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2025-10-23
Updated 2026-08-12
Modified 2026-07-02
Fix URL N/A

Affected Packages

Software From version Fixed in
stackvector — —

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