NULL Pointer Dereference Affecting openshift-service-mesh/proxyv2-rhel9 package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.45% (37th percentile)

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  • Snyk IDSNYK-RHEL8-OPENSHIFTSERVICEMESHPROXYV2RHEL9-17810232
  • published3 Jul 2026
  • disclosed26 Jun 2026

Introduced: 26 Jun 2026

CVE-2026-47221  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 openshift-service-mesh/proxyv2-rhel9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openshift-service-mesh/proxyv2-rhel9 package and not the openshift-service-mesh/proxyv2-rhel9 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.18.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, the router filter contains a null pointer dereference vulnerability when handling HTTP 303 (See Other) internal redirects for body-less non-GET/HEAD requests. When a POST, PUT, DELETE, or PATCH request without a body is sent to a route configured with internal redirect policy that includes 303 in redirect_response_codes, and the upstream responds with HTTP 303, the redirect handling code attempts to drain a request body buffer that was never allocated. This results in a segmentation fault that crashes the entire Envoy process. When route configured with internal_redirect_policy including 303 in redirect_response_codes and upstream must return HTTP 303 response, an unauthenticated attacker can exploit this to cause complete denial of service, terminating all active connections. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.

CVSS Base Scores

version 3.1