---
id: CVE-2025-4432
title: A flaw was found in Rust's Ring package
summary: >-
  A flaw was found in Rust's Ring package. A panic may be triggered when
  overflow checking is enabled. In the QUIC protocol, this flaw allows an
  attacker to induce this panic by sending a specially crafted packet. It will
  likely occur unin…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-770
published: '2025-05-09'
updated: '2026-06-26'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-4432'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2025-4432'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2350655'
    label: secalert@redhat.com
  - url: 'https://github.com/advisories/GHSA-4p46-pwfr-66x6'
    label: secalert@redhat.com
  - url: 'https://github.com/briansmith/ring'
    label: secalert@redhat.com
  - url: >-
      https://github.com/briansmith/ring/blob/main/RELEASES.md#version-01712-2025-03-05
    label: secalert@redhat.com
  - url: >-
      https://github.com/briansmith/ring/commit/ec2d3cf1d91f148c84e4806b4f0b3c98f6df3b38
    label: secalert@redhat.com
  - url: 'https://github.com/briansmith/ring/pull/2447'
    label: secalert@redhat.com
  - url: 'https://rustsec.org/advisories/RUSTSEC-2025-0009.html'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00986
epssPercentile: 0.6077
ingestedAt: '2026-06-26T16:43:13.604Z'
---

## Overview

A flaw was found in Rust's Ring package. A panic may be triggered when overflow checking is enabled. In the QUIC protocol, this flaw allows an attacker to induce this panic by sending a specially crafted packet. It will likely occur unintentionally in 1 out of every 2**32 packets sent or received.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.