Description
Envoy is an open source edge and service proxy, designed for cloud-native applications. Sending a locally generated response must stop further processing of request or response data. Envoy tracks the amount of buffered request and response data and aborts the request if the amount of buffered data is over the limit by sending 413 or 500 responses. However when the buffer overflows while response is processed by the filter chain the operation may not be aborted correctly and result in accessing a freed memory block. If this happens Envoy will crash resulting in a denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| envoyproxy | envoy | < 1.18.6, >= 1.19.0, < 1.19.3, >= 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