---
id: CVE-2021-29937
aliases:
  - GHSA-hpcx-3pw8-g3j2
title: Free of uninitialized memory in telemetry
summary: Free of uninitialized memory in telemetry
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: telemetry
product: telemetry
ecosystem: rust
affected:
  - telemetry < 0.1.3
patched:
  - telemetry 0.1.3
published: '2021-08-25'
updated: '2026-08-29'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-hpcx-3pw8-g3j2'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2021-29937'
  - url: 'https://github.com/Yoric/telemetry.rs/issues/45'
  - url: >-
      https://github.com/Yoric/telemetry.rs/commit/2820cf12f2e08645fd6d1f15b4a90a54d6082a81
  - url: 'https://github.com/Yoric/telemetry.rs'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2021-0046.html'
tags:
  - osv
  - rust
epss: 0.01363
epssPercentile: 0.70567
ingestedAt: '2026-08-29T19:29:15.756Z'
---

## Overview

An issue was discovered in the telemetry crate through 0.1.2 for Rust. There is a drop of uninitialized memory if a value.clone() call panics within misc::vec_with_size()

## Affected packages

- `telemetry < 0.1.3`

## Remediation

Upgrade to a patched release:

- `telemetry 0.1.3`