---
id: CVE-2024-32975
title: 'Envoy crashes in QuicheDataReader::PeekVarInt62Length()'
summary: >-
  Envoy is a cloud-native, open source edge and service proxy. There is a crash
  at `QuicheDataReader::PeekVarInt62Length()`. It is caused by integer underflow
  in the `QuicStreamSequencerBuffer::PeekRegion()` implementation.
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-191
vendor: envoyproxy
product: envoy
affected:
  - 'envoy >= 1.30.0, <= 1.30.1'
  - 'envoy >= 1.29.0, <= 1.29.4'
  - 'envoy >= 1.28.0, <= 1.28.3'
  - envoy <= 1.27.5
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2024-06-20T15:20:00.503325Z'
exploitAvailable: true
published: '2024-06-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T15:56:04.290Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-32975'
references:
  - url: >-
      https://github.com/envoyproxy/envoy/security/advisories/GHSA-g9mq-6v96-cpqc
    label: >-
      https://github.com/envoyproxy/envoy/security/advisories/GHSA-g9mq-6v96-cpqc
tags:
  - cve.org
  - exploit-available
epss: 0.00693
epssPercentile: 0.53031
ingestedAt: '2026-11-05T21:36:00.933Z'
---

## Overview

Envoy is a cloud-native, open source edge and service proxy. There is a crash at `QuicheDataReader::PeekVarInt62Length()`. It is caused by integer underflow in the `QuicStreamSequencerBuffer::PeekRegion()` implementation.

## Affected

- `envoy >= 1.30.0, <= 1.30.1`
- `envoy >= 1.29.0, <= 1.29.4`
- `envoy >= 1.28.0, <= 1.28.3`
- `envoy <= 1.27.5`

## Remediation

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