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CVE-2023-35945

7.5 high SSVC exploitation: poc Modified
NVD · CVE.org

Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy’s HTTP/2 codec may leak a header map and bookkeeping structures upon receiving `RST_STREAM` immediately followed by the `GOAWAY` frames from an upstream server. In nghttp2, cleanup of pending requests due to receipt of the `GOAWAY` frame skips de-allocation of the bookkeeping structure and pending compressed header. The error return [code path] is taken if connection is already marked for not sending more requests due to `GOAWAY` frame. The clean-up code is right after the return statement, causing memory leak. Denial of service through memory exhaustion. This vulnerability was patched in versions(s) 1.26.3, 1.25.8, 1.24.9, 1.23.11.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.5 · envoyproxy, nghttp2NVD modified 2026-10-15 00:16

Affected (CPE criteria) 2

  • cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
  • cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*

References 6