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TI-2022-11767 Aliases CVE-2022-29224

Segmentation fault leading to crash in Envoy

Priority LOW 28CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

Envoy is a cloud-native high-performance proxy. Versions of envoy prior to 1.22.1 are subject to a segmentation fault in the GrpcHealthCheckerImpl. Envoy can perform various types of upstream health checking. One of them uses gRPC. Envoy also has a feature which can “hold” (prevent removal) upstream hosts obtained via service discovery until configured active health checking fails. If an attacker controls an upstream host and also controls service discovery of that host (via DNS, the EDS API, etc.), an attacker can crash Envoy by forcing removal of the host from service discovery, and then failing the gRPC health check request. This will crash Envoy via a null pointer dereference. Users are advised to upgrade to resolve this vulnerability. Users unable to upgrade may disable gRPC health checking and/or replace it with a different health checking type as a mitigation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01038 64th percentileScored 2026-11-07
Fix Fixed envoy (envoyproxy): 1.22.1Red Hat: 2 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
envoyproxyenvoybefore 1.22.11.22.1Patch availableCNA
  • envoy Vendorenvoyproxy Affected before 1.22.1 Fixed in 1.22.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*before 1.22.1Vulnerableenvoyproxy
  • cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* Versions before 1.22.1 Vulnerable ·envoyproxy

Remediation

  • Fix · CNA envoy (envoyproxy) Fixed in 1.22.1

Red Hat 2 advisories

  • RHSA-2022:5004 Released 2022-06-13 · Red Hat rating Critical
    Red Hat OpenShift Service Mesh 2.1.3 security update
    • OpenShift Service Mesh 2.1 servicemesh-2.1.3-1.el8, servicemesh-cni-2.1.3-1.el8, servicemesh-operator-2.1.3-2.el8 +6
  • RHSA-2022:5003 Released 2022-06-13 · Red Hat rating Important
    Red Hat OpenShift Service Mesh 2.0.10 security update
    • OpenShift Service Mesh 2.0 servicemesh-proxy-2.0.10-1.el8

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
OpenShift Service Mesh 2.0Fixed RHSA-2022:5003
OpenShift Service Mesh 2.1Fixed RHSA-2022:5004
Not affected: 2 products
  • OpenShift Service Mesh 2.0
  • OpenShift Service Mesh 2.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-29224

References

Patch 1

Advisory 1

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2024-20001 HTTP/2: CPU exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
  • TI-2024-18524 HTTP/2: memory exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
  • TI-2023-12215 Envoy client may fake the header `x-envoy-original-path` CVSS 3.1CRITICAL 9.1
  • TI-2023-18002 Envoy vulnerable to OAuth2 credentials exploit with permanent validity CVSS 3.1CRITICAL 9.8
See all 126 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences