Skip to content
Fencer Vulns
high 7.5

CVE-2023-39325 json

HTTP/2 rapid reset can cause excessive work in net/http

published 2023-10-11 3 y ago modified 2026-09-28 42 d ago also BIT-golang-2023-39325 , EUVD-2023-2635 , GHSA-4374-p667-p6c8 , GO-2023-2102

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.8%
EPSS 3.8% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.

Patch / fix

  • go golang.org/x/net 0.17.0
  • bitnami golang 1.20.10, 1.21.3
  • go stdlib 1.20.10, 1.21.3
  • Go standard library net/http 1.20.10, 1.21.3
  • golang.org/x/net golang.org/x/net/http2 0.17.0
  • golang-1.17 Ubuntu 22.04 LTS 1.17.13-3ubuntu1.2
  • golang-1.18 Ubuntu 20.04 LTS 1.18.1-1ubuntu1~20.04.3
  • golang-1.18 Ubuntu 22.04 LTS 1.18.1-1ubuntu1.2
  • golang-1.20 Ubuntu 20.04 LTS 1.20.3-1ubuntu0.1~20.04.1
  • golang-1.20 Ubuntu 22.04 LTS 1.20.3-1ubuntu0.1~22.04.1
  • golang-1.21 Ubuntu 20.04 LTS 1.21.1-1~ubuntu20.04.2
  • golang-1.21 Ubuntu 22.04 LTS 1.21.1-1~ubuntu22.04.2
  • golang-1.18 Ubuntu Pro 16.04 LTS 1.18.1-1ubuntu1~16.04.6+esm1

ubuntu advisories UBUNTU-CVE-2023-39325

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • receptor ansible automation platform inside 2.3, ansible automation platform developer 2.3, ansible automation platform 2.3 +1 more 1.4.2-1.el8ap
  • receptor ansible automation platform inside 2.3, ansible automation platform developer 2.3, ansible automation platform 2.3 +1 more 1.4.2-1.el9ap
  • receptorctl ansible automation platform inside 2.3, ansible automation platform developer 2.3, ansible automation platform 2.3 +1 more 1.4.2-1.el8ap
  • receptorctl ansible automation platform inside 2.3, ansible automation platform developer 2.3, ansible automation platform 2.3 +1 more 1.4.2-1.el9ap
  • jenkins ocp tools 4.13 2.414.3.1698292201-3.el8
  • jenkins-2-plugins ocp tools 4.13 4.13.1698292274-1.el8
  • delve RHEL 8 1.9.1-1.module+el8.8.0+16778+5fbb74f5
  • golang RHEL 8 1.19.13-1.module+el8.8.0+20373+d9cd605c

red hat advisories RHSA-2023:5810RHSA-2026:8322RHSA-2023:6179RHSA-2023:5809RHSA-2023:5721RHSA-2024:0777

  • containerized-data-importer SLE Module for Containers 15 SP7 1.64.0-150700.9.11.1
  • kubernetes1.25 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Module for Containers 15 SP6 +5 more 1.25.16-150400.9.16.1
  • kubernetes1.24 SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 1.24.17-150300.7.6.1
  • kubernetes1.24 SLE Module for Containers 15 SP5, openSUSE Leap 15.6, openSUSE Leap 15.5 1.24.17-150500.3.22.1
  • kubernetes1.24 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 1.24.17-150400.9.16.1
  • kubernetes1.27 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Module for Containers 15 SP6 +5 more 1.27.16-150400.9.10.1
  • kubernetes1.28 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Module for Containers 15 SP6 +5 more 1.28.13-150400.9.8.1
  • kubernetes1.26 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Module for Containers 15 SP6 +5 more 1.26.15-150400.9.11.1

suse advisories SUSE-SU-2026:2493-1SUSE-SU-2024:3344-1SUSE-SU-2024:3343-1SUSE-SU-2024:3342-1SUSE-SU-2024:3341-1SUSE-SU-2024:3098-1

  • fake-gcs-server openSUSE Tumbleweed 1.56.1-1.1
  • traefik2 openSUSE Tumbleweed 2.11.5-1.1
  • go1.20 openSUSE Tumbleweed 1.20.10-1.1
  • go1.21 openSUSE Tumbleweed 1.21.3-1.1
  • cmctl openSUSE Tumbleweed 1.13.2-1.1
  • velero openSUSE Tumbleweed 1.12.1-1.1
  • traefik openSUSE Tumbleweed 2.10.7-1.1
  • go1.21 Package Hub 12 1.21.3-2.1

opensuse advisories openSUSE-SU-2026:11819-1openSUSE-SU-2024:14076-1openSUSE-SU-2024:13326-1openSUSE-SU-2024:13327-1openSUSE-SU-2024:13376-1openSUSE-SU-2024:13384-1

  • toolbox AlmaLinux 9 0.0.99.3-10.el9_2
  • toolbox-tests AlmaLinux 9 0.0.99.3-10.el9_2
  • grafana AlmaLinux 8 7.5.15-5.el8_8.alma.1
  • grafana AlmaLinux 9 9.0.9-4.el9_2.alma.1
  • delve AlmaLinux 8 1.9.1-1.module_el8.8.0+3471+a62632a0
  • golang AlmaLinux 8 1.19.13-1.module_el8.8.0+3625+a06035cf
  • go-toolset AlmaLinux 8 1.19.13-1.module_el8.8.0+3625+a06035cf
  • golang-bin AlmaLinux 8 1.19.13-1.module_el8.8.0+3625+a06035cf

almalinux advisories ALSA-2023:6077ALSA-2023:5863ALSA-2023:5867ALSA-2023:5721ALSA-2023:5738

  • toolbox Rocky Linux 9 0.0.99.3-10.el9_2.rocky.0.1
  • go-toolset Rocky Linux 9 1.19.13-1.el9_2
  • delve Rocky Linux 8 1.9.1-1.module+el8.8.0+1263+19d1a562
  • golang Rocky Linux 8 1.19.13-1.module+el8.8.0+1526+386b5e05
  • go-toolset Rocky Linux 8 1.19.13-1.module+el8.8.0+1526+386b5e05
  • grafana Rocky Linux 8 7.5.15-5.el8_8

rocky linux advisories RLSA-2023:6077RLSA-2023:5738RLSA-2023:5721RLSA-2023:5863

  • go Alpine 3.18 1.20.10-r0
  • go Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 1.21.3-r0

alpine advisories ALPINE-CVE-2023-39325

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • golang CBL-Mariner 2.0, Azure Linux 3.0 1.20.7-2
  • blobfuse2 CBL-Mariner 2.0 2.1.1-1
  • cri-tools CBL-Mariner 2.0 1.28.0-2
  • telegraf CBL-Mariner 2.0 1.27.3-3
  • cert-manager CBL-Mariner 2.0, Azure Linux 3.0 1.11.2-5
  • moby-compose CBL-Mariner 2.0 2.17.2-5
  • moby-containerd CBL-Mariner 2.0 1.6.22-2
  • moby-containerd-cc CBL-Mariner 2.0, Azure Linux 3.0 1.7.1-5

azure linux advisories AZL-31310AZL-31608AZL-31609AZL-31616AZL-31639AZL-31645

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

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-2023-39325 updated cvss 7.5

golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487)

  • Red Hat Builds for Red Hat OpenShift openshift-builds-triggers-container, openshift-builds/openshift-builds-rhel8-operator, openshift-builds/openshift-builds-controller-rhel8 Red Hat Cost Management Metrics Operator costmanagement/costmanagement-metrics-rhel8-operator
    affected: workaround, no fix available
  • Red Hat Migration Toolkit for Applications 7 mta/mta-hub-rhel9, mta/mta-rhel8-operator, mta/mta-windup-shim-rhel9, mta/mta-analyzer-lsp-rhel9, openshift4/mta-analyzer-addon Red Hat Migration Toolkit for Runtimes mtr/mtr-rhel8-operator
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat NBDE Tang Server tang-operator-container
    affected: workaround, no fix planned “Will not fix”
  • Red Hat OpenShift Developer Tools and Services odo, ocp-tools-4/jenkins-rhel8
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat OpenShift Serverless openshift-serverless-1/kn-serving-controller-rhel9, openshift-serverless-1/kn-eventing-apiserver-receive-adapter-rhel9 Red Hat 3scale API Management Platform 2 3scale-amp2/apicast-rhel9-operator
    affected: workaround, no fix available
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/subctl-rhel9, rhacm2/nettest-rhel9, rhacm2/volsync-rhel8, rhacm2/gatekeeper-rhel8, rhacm2/acm-search-v2-operator, rhacm2/acm-search-v2-api-rhel9, +5 more
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Advanced Cluster Security 3 advanced-cluster-security/rhacs-scanner-rhel8, advanced-cluster-security/rhacs-rhel8-operator
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat build of Apicurio Registry 2 openshift-service-mesh/istio-rhel9-operator Red Hat Ceph Storage 5 golang, grafana, golang-x-net, grafana-sdk-go Red Hat Ceph Storage 6 golang, grafana, golang-x-net, grafana-sdk-go
    affected: workaround, no fix available
show 18 more
  • Red Hat Certification for Red Hat Enterprise Linux 8 redhat-certification-cnf, redhat-certification-preflight
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Certification Program for Red Hat Enterprise Linux 9 redhat-certification-cnf, redhat-certification-preflight Red Hat Enterprise Linux 8 toolbox, toolbox-tests Red Hat Enterprise Linux 9 butane, ignition, ignition-edge, ignition-grub, ignition-validate
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift Container Platform 3.11 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, ansible-service-broker, atomic-openshift-tests, atomic-openshift-master, +20 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 4 buildah, ignition, buildah-tests, ignition-validate, openshift4/ose-contour-rhel8, ose-haproxy-router-base-container, +8 more
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform Assisted Installer 1 rhai-tech-preview/assisted-installer-rhel8, rhai-tech-preview/assisted-installer-agent-rhel8
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Openshift Data Foundation 4 mcg, golang-x-net, odf-rhel9-operator, odf4/odr-hub-operator-bundle
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat OpenShift Data Science (RHODS) odh-mcad-controller-container, rhods/odh-mm-rest-proxy-rhel8, rhods/odh-operator-base-rhel8, odh-operator-base-v2-container, rhods/odh-model-controller-rhel8, rhods/odh-codeflare-operator-rhel8, +7 more Red Hat OpenShift distributed tracing 2 rhosdt/tempo-rhel8, rhosdt/tempo-query-rhel8, rhosdt/jaeger-agent-rhel8, rhosdt/jaeger-query-rhel8, rhosdt/tempo-gateway-rhel8, rhosdt/tempo-rhel8-operator, +9 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenShift on AWS rosa Red Hat Openshift Sandboxed Containers openshift-sandboxed-containers/osc-rhel8-operator, openshift-sandboxed-containers/osc-podvm-payload-rhel9 Red Hat OpenShift Virtualization 4 openshift-golang-builder-container
    affected: workaround, no fix available
  • Red Hat OpenStack Platform 16.1 golang-github-infrawatch-apputils Red Hat OpenStack Platform 17.0 collectd-libpod-stats, golang-github-infrawatch-apputils
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 18.0 dataplane-operator-container, rhoso-operators/ovn-rhel9-operator, rhoso-operators/heat-rhel9-operator, rhoso-operators/nova-rhel9-operator, rhoso-operators/infra-rhel9-operator, rhoso-operators/swift-rhel9-operator, +17 more Red Hat Satellite 6 yggdrasil-worker-forwarder
    affected: workaround, no fix available
  • Red Hat Storage 3 golang, heketi, grafana, golang-bin, golang-src, golang-misc, +4 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Web Terminal web-terminal-exec-container, web-terminal/web-terminal-rhel9-operator
    affected: workaround, no fix available
  • Red Hat Cert Manager support for Red Hat OpenShift release cert-manager/cert-manager-operator-rhel9 v1.11.5-5, cert-manager/cert-manager-operator-rhel9 v1.12.1-5, cert-manager/jetstack-cert-manager-rhel9 v1.11.5-4, cert-manager/jetstack-cert-manager-rhel9 v1.12.5-3
    fixed: vendor fix RHSA-2023:6279
  • Red Hat CNV 4.11 for RHEL 8 container-native-virtualization/checkup-framework v4.11.7-5, container-native-virtualization/hostpath-csi-driver v4.11.7-5, container-native-virtualization/hostpath-csi-driver-rhel8 v4.11.7-5, container-native-virtualization/vm-network-latency-checkup v4.11.7-5, container-native-virtualization/kubevirt-tekton-tasks-operator v4.11.7-6, container-native-virtualization/kubevirt-tekton-tasks-cleanup-vm v4.11.7-12, +7 more
    fixed: vendor fix RHSA-2023:6251
  • Red Hat CNV 4.12 for RHEL 8 container-native-virtualization/virt-api v4.12.8-5, container-native-virtualization/kubemacpool v4.12.8-3, container-native-virtualization/kubemacpool v4.12.9-5, container-native-virtualization/virt-handler v4.12.8-5, container-native-virtualization/bridge-marker v4.12.8-3, container-native-virtualization/bridge-marker v4.12.9-5, +45 more
    fixed: vendor fix RHSA-2023:6248
  • Red Hat CNV 4.13 for RHEL 7 kubevirt 4.13.6-1596.el7, kubevirt-virtctl 4.13.6-1596.el7, kubevirt-virtctl-redistributable 4.13.6-1596.el7 Red Hat CNV 4.13 for RHEL 8 kubevirt 4.13.6-1596.el8, kubevirt-virtctl 4.13.6-1596.el8, kubevirt-virtctl-redistributable 4.13.6-1596.el8 Red Hat CNV 4.13 for RHEL 9 kubevirt 4.13.6-1596.el9, kubevirt-virtctl 4.13.6-1596.el9, kubevirt-virtctl-redistributable 4.13.6-1596.el9, container-native-virtualization/virt-api-rhel9 v4.13.5--2023-120566, container-native-virtualization/kubevirt-ssp-operator-rhel9 v4.13.5-6, container-native-virtualization/kubevirt-ssp-operator-rhel9 v4.13.6-4, +50 more
    fixed: vendor fix RHSA-2023:7521
  • Red Hat CNV 4.14 for RHEL 9 container-native-virtualization/pr-helper-rhel9 v4.14.0-395, container-native-virtualization/mtq-operator-rhel9 v4.14.1-2, container-native-virtualization/mtq-operator-rhel9 v4.14.0-82, container-native-virtualization/mtq-controller-rhel9 v4.14.0-83, container-native-virtualization/mtq-lock-server-rhel9 v4.14.0-83, container-native-virtualization/virt-api-rhel9 v4.14.0--2023-113931, +50 more
    fixed: vendor fix RHSA-2023:6817
  • Red Hat Cryostat 2 on RHEL 8 cryostat-tech-preview/cryostat-rhel8-operator 2.3.1-11
    fixed: vendor fix RHSA-2023:6031

108 more fixed, 79 more not affected in the full advisory

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

Exploit prediction

3.80% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go golang.org/x/net
<0.17.0
0.17.0
bitnami golang
>=1.20.0, <1.20.10
>=1.21.0, <1.21.3
1.20.10
1.21.3
go stdlib
<1.20.10
>=1.21.0-0, <1.21.3
1.20.10
1.21.3

Affected products

  • Go standard library net/http
  • golang.org/x/net golang.org/x/net/http2

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns 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.