CVE-2024-32975: Envoy crashes in QuicheDataReader::PeekVarInt62Length()

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-06-04 · updated 2026-06-17
Weakness: CWE-191

Description

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 products

envoyproxy envoy: before 1.27.6; from 1.28.0 before 1.28.4; from 1.29.0 before 1.29.5; from 1.30.0 before 1.30.2 — fixed in 1.27.6, 1.28.4, 1.29.5, 1.30.2

How to fix

Upgrade to a fixed version: envoyproxy envoy 1.27.6, 1.28.4, 1.29.5, 1.30.2. Check the vendor advisory for mitigations.

References

https://github.com/envoyproxy/envoy/security/advisories/GHSA-g9mq-6v96-cpqc
https://github.com/envoyproxy/envoy/security/advisories/GHSA-g9mq-6v96-cpqc

Get alerted when CVE-2024-32975 or the next vulnerability affects your stack