CVE-2025-62409
BaseFortify
Publication date: 2025-10-16
Last updated on: 2025-10-29
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| envoyproxy | envoy | to 1.33.11 (exc) |
| envoyproxy | envoy | From 1.34.0 (inc) to 1.34.9 (exc) |
| envoyproxy | envoy | From 1.35.0 (inc) to 1.35.5 (exc) |
| envoyproxy | envoy | 1.36.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-476 | The product dereferences a pointer that it expects to be valid but is NULL. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability in Envoy, a cloud-native edge and service proxy, occurs when large requests and responses cause TCP connection pool crashes due to flow control management issues. Specifically, it happens when a connection is closing but upstream data is still arriving, leading to a buffer watermark callback nullptr reference. It affects TCP proxy and HTTP 1 & 2 mixed use cases based on ALPN. The issue is fixed in versions 1.36.1, 1.35.5, 1.34.9, and 1.33.10.
How can this vulnerability impact me? :
The vulnerability can cause TCP connection pool crashes in Envoy when handling large requests and responses, potentially leading to service disruptions or degraded performance in systems relying on Envoy for proxying TCP and HTTP traffic.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, upgrade Envoy to one of the fixed versions: 1.36.1, 1.35.5, 1.34.9, or 1.33.10.