GitHub Advisoryadvisory · crates.io
GHSA-rxr4-x558-x7hw Double free in smallvec
CRITICAL
Official page ↗
- Aliases
- CVE-2018-20991
- Ecosystem
- crates.io
- Packages
- smallvec
- Severity
- Critical
- CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-415
- Reviewed
- 2021-08-19
Affected packages
• crates.io smallvec: >= 0.3.2, < 0.6.3 → fixed in 0.6.3
Description
If an iterator passed to SmallVec::insert_many panicked in Iterator::next, destructors were run during unwinding while the vector was in an inconsistent state, possibly causing a double free (a destructor running on two copies of the same value).
This is fixed in smallvec 0.6.3 by ensuring that the vector's length is not updated to include moved items until they have been removed from their original positions. Items may now be leaked if Iterator::next panics, but they will not be dropped more than once.
Related
Alias · CVE (1)
- CVE-2018-20991 An issue was discovered in the smallvec crate before 0.6.3 for Rust. vulnerability
Weakness · CWE (1)
- CWE-415 Double Free weakness