Description
Envoy is an open source edge and service proxy, designed for cloud-native applications. When a cluster is deleted via Cluster Discovery Service (CDS) all idle connections established to endpoints in that cluster are disconnected. A recursion was introduced in the procedure of disconnecting idle connections that can lead to stack exhaustion and abnormal process termination when a cluster has a large number of idle connections. This infinite recursion causes Envoy to crash. Users are advised to upgrade.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| envoyproxy | envoy | >= 1.20.0, < 1.20.2, >= 1.21.0, < 1.21.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Service Mesh 2 | kiali | v1.24.7.redhat1-1.el8 | RHSA-2022:1276 |
| Red Hat Service Mesh 2 | servicemesh +6 | 2.0.9-3.el8 | RHSA-2022:1276, RHSA-2022:1275 |
| Red Hat Service Mesh 2 | servicemesh-cni +1 | 2.1.2-4.el8 | RHSA-2022:1275 |
| Red Hat Service Mesh 2 | servicemesh-prometheus | 2.14.0-16.el8.1 | RHSA-2022:1276 |
Advisories 3
- RHSA-2022:1276 Red Hat Security Advisory: Red Hat OpenShift Service Mesh 2.0.9 security update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2022:1275 Red Hat Security Advisory: Red Hat OpenShift Service Mesh 2.1.2 security update Red Hat Security Advisories (RHSA) · Mar 27, 2026
- WID-SEC-2022-0970 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 21, 2024