CVE-2025-62409

Envoy allows large requests and responses to cause TCP connection pool crash

Description

Envoy is a cloud-native, open source edge and service proxy. Prior to 1.36.1, 1.35.5, 1.34.9, and 1.33.10, large requests and responses can potentially trigger TCP connection pool crashes due to flow control management in Envoy. It will happen when the connection is closing but upstream data is still coming, resulting in a buffer watermark callback nullptr reference. The vulnerability impacts TCP proxy and HTTP 1 & 2 mixed use cases based on ALPN. This vulnerability is fixed in 1.36.1, 1.35.5, 1.34.9, and 1.33.10.

Scores

Faiblesses (CWE)

• CWE-476

Références européennes

• ENISA EUVD · EUVD-2025-34820
• GCVE · GCVE-0-2025-62409

Configurations affectées (CPE NVD)

• cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* < 1.33.11
• cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* ≥ 1.34.0 < 1.34.9
• cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* ≥ 1.35.0 < 1.35.5
• cpe:2.3:a:envoyproxy:envoy:1.36.0:*:*:*:*:*:*:*

Produits affectés

Références

• https://github.com/envoyproxy/envoy/security/advisories/GHSA-pq33-4jxh-hgm3

Sources