---
id: CVE-2024-32650
aliases:
  - RUSTSEC-2024-0336
  - GHSA-6g7w-8wpp-frhj
title: >-
  `rustls::ConnectionCommon::complete_io` could fall into an infinite loop based
  on network input
summary: >-
  `rustls::ConnectionCommon::complete_io` could fall into an infinite loop based
  on network input
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: rustls
product: rustls
ecosystem: rust
affected:
  - 'rustls >= 0.23.0, < 0.23.5'
patched:
  - rustls 0.23.5
published: '2024-04-19'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T18:00:07.054681492Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2024-0336'
references:
  - url: 'https://crates.io/crates/rustls'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2024-0336.html'
  - url: >-
      https://github.com/rustls/rustls/commit/2123576840aa31043a31b0770e6572136fbe0c2d
tags:
  - osv
  - rust
epss: 0.00949
epssPercentile: 0.60139
ingestedAt: '2026-10-13T11:45:30.167Z'
---

## Overview

If a `close_notify` alert is received during a handshake, `complete_io`
does not terminate.

Callers which do not call `complete_io` are not affected.

`rustls-tokio` and `rustls-ffi` do not call `complete_io`
and are not affected.

`rustls::Stream` and `rustls::StreamOwned` types use
`complete_io` and are affected.

## Affected packages

- `rustls >= 0.23.0, < 0.23.5`

## Remediation

Upgrade to a patched release:

- `rustls 0.23.5`