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Fencer Intel
high 8.7

CVE-2026-84304 json

gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation

published 2mo ago modified last mo. also EUVD-2026-69420 , GHSA-vp52-pcj8-j9qc , GO-2026-6348

cvss
8.7
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, internal/transport/transport.go stores each fragmented HTTP/2 DATA frame as a separate recvMsg in recvBuffer, so millions of one-byte frames can consume disproportionate heap memory even when payload bytes remain within connection and stream flow-control windows. An unauthenticated remote attacker can use concurrent multiplexed streams to exhaust process memory and cause a runtime panic or out-of-memory termination. Receive-buffer compaction is enabled by default and can be controlled temporarily with GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION. This issue is fixed in version 1.83.1.

Patch / fix

  • go google.golang.org/grpc 1.83.1
  • grpc grpc 1.83.1
  • kubevirt SLE Module for Containers 15 SP7 1.7.4-150700.3.42.1
  • terraform-provider-aws SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.11.0-150200.6.29.2
  • terraform-provider-tls SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.0.0-150200.5.26.2
  • terraform-provider-helm SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 2.9.0-150200.6.34.2
  • terraform-provider-null SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.0.0-150200.6.32.2
  • terraform-provider-local SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 2.0.0-150200.6.30.2
  • terraform-provider-google SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.43.0-150200.6.23.2
  • terraform-provider-random SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 3.0.0-150200.6.26.2

suse advisories SUSE-SU-2026:5167-1SUSE-SU-2026:4628-1SUSE-SU-2026:24213-1SUSE-SU-2026:24150-1SUSE-SU-2026:4444-1SUSE-SU-2026:4392-1

  • rqlite openSUSE Leap 16.0 10.6.6-bp160.1.1
  • containerd openSUSE Tumbleweed 2.4.2-1.1
  • kubevirt1.8 openSUSE Tumbleweed 1.8.4-7.1
  • tekton-cli openSUSE Tumbleweed 0.46.2-1.1
  • gh openSUSE Leap 16.0 2.102.0-bp160.1.1
  • coredns openSUSE Leap 16.0 1.14.7-bp160.2.1
  • rqlite openSUSE Tumbleweed 10.6.1-1.1
  • gh openSUSE Tumbleweed 2.102.0-1.1

opensuse advisories openSUSE-SU-2026:22224-1openSUSE-SU-2026:12342-1openSUSE-SU-2026:12241-1openSUSE-SU-2026:12253-1openSUSE-SU-2026:22134-1openSUSE-SU-2026:22135-1

  • azcopy Azure Linux 3.0 10.25.1-9
  • azurelinux-image-tools Azure Linux 3.0 1.6.0-3
  • containerd2 Azure Linux 3.0 2.3.7-1
  • containerized-data-importer Azure Linux 3.0 1.62.0-8
  • coredns Azure Linux 3.0 1.11.4-21
  • cri-tools Azure Linux 3.0 1.32.0-10
  • docker-buildx Azure Linux 3.0 0.14.0-19
  • docker-compose Azure Linux 3.0 2.27.0-15

azure linux advisories AZL-99150AZL-99153AZL-99180AZL-99183AZL-99186AZL-99189

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-84304 updated cvss 7.5

google.golang.org/grpc: gRPC-Go: Denial of Service via HTTP/2 DATA Frame Fragmentation

  • Red Hat Multicluster Engine for Kubernetes multicluster-engine/work-rhel9, multicluster-engine/placement-rhel9, multicluster-engine/registration-rhel9, multicluster-engine/addon-manager-rhel9, multicluster-engine/assisted-service-9-rhel9, multicluster-engine/multicloud-manager-rhel9, +2 more Red Hat OpenShift Pipelines openshift-pipelines/pipelines-cli-tkn-rhel9, openshift-pipelines/pipelines-resolvers-rhel9, openshift-pipelines/pipelines-results-api-rhel9, openshift-pipelines/pipelines-results-watcher-rhel9, openshift-pipelines/pipelines-triggers-webhook-rhel9, openshift-pipelines/pipelines-chains-controller-rhel9, +6 more Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/kube-rbac-proxy-rhel9
    affected: workaround, no fix available
  • Red Hat Hardened Images opentofu1.11 1.11.14-0.1.hum1
    affected: workaround, no fix planned “Will not fix”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-workbenches-operator-rhel9, rhoai/odh-model-registry-operator-rhel9, rhoai/odh-kuberay-operator-controller-rhel9 Red Hat OpenShift Container Platform 4 openshift4/ose-kube-rbac-proxy-rhel9 Red Hat OpenShift Container Platform 5 openshift5/ose-kube-rbac-proxy-rhel9 Red Hat OpenShift distributed tracing 3 rhosdt/opentelemetry-rhel9-operator, rhosdt/opentelemetry-collector-rhel9
    affected: workaround, no fix available
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17 cert-manager/cert-manager-operator-rhel9 1791788287, cert-manager/jetstack-cert-manager-rhel9 1791371069, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791371080
    fixed: vendor fix RHSA-2026:82322
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/prometheus-rhel9 1793662399, cluster-observability-operator/prometheus-rhel9 1793822854, cluster-observability-operator/obo-prometheus-rhel9-operator 1793661150, cluster-observability-operator/obo-prometheus-rhel9-operator 1793823694, cluster-observability-operator/cluster-observability-rhel9-operator 1793662110, cluster-observability-operator/cluster-observability-rhel9-operator 1793847117
    fixed: vendor fix RHSA-2026:95591
  • Red Hat Logging Subsystem for Red Hat OpenShift 6.6 openshift-logging/cluster-logging-rhel9-operator 1793051087
    fixed: vendor fix RHSA-2026:92515
  • Red Hat multicluster engine for Kubernetes 2.8 multicluster-engine/kube-rbac-proxy-mce-rhel9 1793020034
    fixed: vendor fix RHSA-2026:92303
  • Red Hat Advanced Cluster Management for Kubernetes 2.13 rhacm2/multicloud-integrations-rhel9 1792847819, rhacm2/multicluster-operators-channel-rhel9 1792906953, rhacm2/multicluster-observability-rhel9-operator 1793032994, rhacm2/multicluster-operators-subscription-rhel9 1792886460
    fixed: vendor fix RHSA-2026:92307
show 8 more
  • Red Hat Advanced Cluster Security for Kubernetes 4.11 advanced-cluster-security/rhacs-main-rhel9 1791396165, advanced-cluster-security/rhacs-rhel9-operator 1791396165, advanced-cluster-security/rhacs-scanner-v4-rhel9 1791396165, advanced-cluster-security/rhacs-scanner-slim-rhel9 1790747681
    fixed: vendor fix RHSA-2026:79575
  • Red Hat OpenShift Builds 1.9.2 openshift-builds/openshift-builds-operator-bundle 1792762900, openshift-builds/openshift-builds-rhel10-operator 1792749358, openshift-builds/openshift-builds-rhel10-operator 1792859629
    fixed: fixed in 1.9.2 RHSA-2026:89041
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/perses-rhel9 1793661985, cluster-observability-operator/perses-rhel9 1793825744, cluster-observability-operator/thanos-rhel9 1793660568, cluster-observability-operator/thanos-rhel9 1793821585, cluster-observability-operator/korrel8r-rhel9 1793661297, cluster-observability-operator/korrel8r-rhel9 1793822079, +38 more Red Hat Logging Subsystem for Red Hat OpenShift 6.6 openshift-logging/vector-rhel9 1793051738, openshift-logging/eventrouter-rhel9 1792998256, openshift-logging/logging-loki-rhel9 1793041359, openshift-logging/loki-rhel9-operator 1793051099, openshift-logging/opa-openshift-rhel9 1793051110, openshift-logging/loki-operator-bundle 1793055216, +3 more Red Hat multicluster engine for Kubernetes 2.8 multicluster-engine/hive-rhel9 1793055767, multicluster-engine/work-rhel9 1792867410, multicluster-engine/discovery-rhel9 1792864323, multicluster-engine/placement-rhel9 1792887454, multicluster-engine/console-mce-rhel9 1792886718, multicluster-engine/must-gather-rhel9 1792838494, +20 more
    not affected: vulnerable code not present
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/cert-policy-controller-rhel9, rhacm2/config-policy-controller-rhel9, rhacm2/governance-policy-propagator-rhel9, rhacm2/acm-governance-policy-framework-addon-rhel9, rhacm2/acm-governance-policy-addon-controller-rhel9
    not affected: vulnerable code not in execute path
  • Red Hat Advanced Cluster Management for Kubernetes 2.13 rhacm2/thanos-rhel9 1792872550, rhacm2/acm-cli-rhel9 1792972427, rhacm2/console-rhel9 1792883111, rhacm2/prometheus-rhel9 1792853139, rhacm2/acm-grafana-rhel9 1792865487, rhacm2/acm-search-v2-rhel9 1792847370, +34 more Red Hat Advanced Cluster Security for Kubernetes 4.11 advanced-cluster-security/rhacs-fact-rhel9 1790133502, advanced-cluster-security/rhacs-roxctl-rhel9 1791396165, advanced-cluster-security/rhacs-scanner-rhel9 1790747681, advanced-cluster-security/rhacs-collector-rhel9 1790320857, advanced-cluster-security/rhacs-operator-bundle 1791396165, advanced-cluster-security/rhacs-central-db-rhel9 1791396165, +3 more
    not affected: vulnerable code not present
  • Red Hat Hardened Images dex 2.45.1-1.hum1, etcd 3.7.2-0.1.hum1, k6v1 1.8.1-0.1.hum1, k6v2 2.3.0-0.1.hum1, helm4 4.3.0-0.2.hum1, rekor 1.5.4-0.1.hum1, +36 more
    not affected: component not present
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-operator-rhel9 Red Hat OpenShift Builds 1.9.2 openshift-builds/openshift-builds-waiters-rhel10 1792762119, openshift-builds/openshift-builds-waiters-rhel10 1792839475, openshift-builds/openshift-builds-webhook-rhel10 1792680944, openshift-builds/openshift-builds-webhook-rhel10 1792835571, openshift-builds/openshift-builds-operator-bundle 1792863311, openshift-builds/openshift-builds-controller-rhel10 1792680723, +11 more
    not affected: vulnerable code not present
  • Red Hat OpenShift Container Platform 4 openshift4/ose-kube-rbac-proxy, openshift4/ose-vertical-pod-autoscaler-rhel9-operator Red Hat OpenShift Container Platform 5 openshift5/ose-vertical-pod-autoscaler-rhel9-operator
    not affected: vulnerable code not in execute path

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2mo ago

Exploit prediction

0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
go google.golang.org/grpc
<1.83.1
1.83.1

Affected products

  • grpc grpc-go

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.