GO-2026-6348Published

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

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cve-program · CVE-2026-84304

Published

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.

Source published: 1 Sep 2026 18:19:10 UTC
Source modified: 1 Sep 2026 19:24:36 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 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

euvd · EUVD-2026-69420

Published

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Sep 1, 2026, 6:19:10 PM

dateUpdated: Sep 1, 2026, 7:24:36 PM

74 related source bulletins · separate from aliases

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CVE-2024-34459 · CVE-2025-5278 · CVE-2025-6170 · CVE-2025-13151 · CVE-2025-14087 · CVE-2025-14512 · CVE-2025-47911 · CVE-2025-47913 · CVE-2025-47914 · CVE-2025-58181 · CVE-2025-58190 · CVE-2026-1965 · CVE-2026-2100 · CVE-2026-2673 · CVE-2026-3783 · CVE-2026-3832 · CVE-2026-3833 · CVE-2026-4046 · CVE-2026-4424 · CVE-2026-4437 · CVE-2026-4438 · CVE-2026-4878 · CVE-2026-5121 · CVE-2026-5260 · CVE-2026-5419 · CVE-2026-5435 · CVE-2026-5450 · CVE-2026-5928 · CVE-2026-6238 · CVE-2026-6653 · CVE-2026-7383 · CVE-2026-8286 · CVE-2026-9076 · CVE-2026-9547 · CVE-2026-11822 · CVE-2026-11824 · CVE-2026-11979 · CVE-2026-13757 · CVE-2026-14164 · CVE-2026-15588 · CVE-2026-16118 · CVE-2026-25680 · CVE-2026-25681 · CVE-2026-27135 · CVE-2026-27136 · CVE-2026-28390 · CVE-2026-29111 · CVE-2026-31790 · CVE-2026-33186 · CVE-2026-33845 · CVE-2026-33846 · CVE-2026-34180 · CVE-2026-34181 · CVE-2026-34182 · CVE-2026-34183 · CVE-2026-34986 · CVE-2026-39827 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39833 · CVE-2026-39834 · CVE-2026-39835 · CVE-2026-40355 · CVE-2026-40356 · CVE-2026-41989 · CVE-2026-42009 · CVE-2026-42010 · CVE-2026-42011 · CVE-2026-42012 · CVE-2026-42013 · CVE-2026-42014 · CVE-2026-42015 · CVE-2026-42502 · CVE-2026-42506 · CVE-2026-42508 · CVE-2026-42764 · CVE-2026-42766 · CVE-2026-42767 · CVE-2026-42768 · CVE-2026-42769 · CVE-2026-42770 · CVE-2026-45445 · CVE-2026-45446 · CVE-2026-45447 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-46598 · CVE-2026-46600 · CVE-2026-48864 · CVE-2026-54369 · CVE-2026-54370 · CVE-2026-54371 · CVE-2026-56854 · CVE-2026-56855 · CVE-2026-58010 · CVE-2026-58011 · CVE-2026-58012 · CVE-2026-58013 · CVE-2026-58014 · CVE-2026-58015 · CVE-2026-58016 · CVE-2026-58055 · CVE-2026-78662 · CVE-2026-84304 · CVE-2026-84445

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CVE-2024-34459 · CVE-2025-5278 · CVE-2025-6170 · CVE-2025-13151 · CVE-2025-14087 · CVE-2025-14512 · CVE-2025-47911 · CVE-2025-47913 · CVE-2025-47914 · CVE-2025-58181 · CVE-2025-58190 · CVE-2026-1965 · CVE-2026-2100 · CVE-2026-2673 · CVE-2026-3783 · CVE-2026-3832 · CVE-2026-3833 · CVE-2026-4046 · CVE-2026-4424 · CVE-2026-4437 · CVE-2026-4438 · CVE-2026-4878 · CVE-2026-5121 · CVE-2026-5260 · CVE-2026-5419 · CVE-2026-5435 · CVE-2026-5450 · CVE-2026-5928 · CVE-2026-6238 · CVE-2026-6653 · CVE-2026-7383 · CVE-2026-8286 · CVE-2026-9076 · CVE-2026-9547 · CVE-2026-11822 · CVE-2026-11824 · CVE-2026-11979 · CVE-2026-13757 · CVE-2026-14164 · CVE-2026-15588 · CVE-2026-16118 · CVE-2026-25680 · CVE-2026-25681 · CVE-2026-27135 · CVE-2026-27136 · CVE-2026-28390 · CVE-2026-29111 · CVE-2026-29181 · CVE-2026-31790 · CVE-2026-33186 · CVE-2026-33845 · CVE-2026-33846 · CVE-2026-34180 · CVE-2026-34181 · CVE-2026-34182 · CVE-2026-34183 · CVE-2026-39827 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39833 · CVE-2026-39834 · CVE-2026-39835 · CVE-2026-40355 · CVE-2026-40356 · CVE-2026-41989 · CVE-2026-42009 · CVE-2026-42010 · CVE-2026-42011 · CVE-2026-42012 · CVE-2026-42013 · CVE-2026-42014 · CVE-2026-42015 · CVE-2026-42502 · CVE-2026-42506 · CVE-2026-42508 · CVE-2026-42764 · CVE-2026-42766 · CVE-2026-42767 · CVE-2026-42768 · CVE-2026-42769 · CVE-2026-42770 · CVE-2026-45445 · CVE-2026-45446 · CVE-2026-45447 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-46598 · CVE-2026-46600 · CVE-2026-48864 · CVE-2026-54369 · CVE-2026-54370 · CVE-2026-54371 · CVE-2026-56854 · CVE-2026-56855 · CVE-2026-58010 · CVE-2026-58011 · CVE-2026-58012 · CVE-2026-58013 · CVE-2026-58014 · CVE-2026-58015 · CVE-2026-58016 · CVE-2026-58055 · CVE-2026-78662 · CVE-2026-84304 · CVE-2026-84445

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CVE-2026-37236 · CVE-2026-39827 · CVE-2026-41178 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

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CVE-2026-56852 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

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CVE-2026-33818 · CVE-2026-39821 · CVE-2026-40161 · CVE-2026-40938 · CVE-2026-46600 · CVE-2026-56851 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-78667 · CVE-2026-78669 · CVE-2026-84304 · CVE-2026-84445 · CVE-2026-97031 · CVE-2026-111943

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CVE-2026-41178 · CVE-2026-59831 · CVE-2026-63209 · CVE-2026-72924 · CVE-2026-78669 · CVE-2026-84304 · CVE-2026-84445

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CVE-2026-84304 · CVE-2026-84445

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CVE-2026-56852 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

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openSUSE-SU-2026:11742-1: google-guest-agent-20260903.01-1.1 on GA media

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CVE-2026-37236 · CVE-2026-39827 · CVE-2026-41178 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

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CVE-2026-19534 · CVE-2026-27145 · CVE-2026-33818 · CVE-2026-39821 · CVE-2026-39822 · CVE-2026-39834 · CVE-2026-42504 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-63209 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-77301 · CVE-2026-82417 · CVE-2026-84292 · CVE-2026-84304 · CVE-2026-84375 · CVE-2026-84445 · CVE-2026-84961 · CVE-2026-85152 · CVE-2026-87018 · CVE-2026-102276 · CVE-2026-102278 · CVE-2026-109383 · CVE-2026-109829 · CVE-2026-109855 · CVE-2026-109869

openSUSE-SU-2026:12241-1: kubevirt1.8-container-disk-1.8.4-7.1 on GA media

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CVE-2026-33186 · CVE-2026-56852 · CVE-2026-56854 · CVE-2026-56855 · CVE-2026-78662 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

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CVE-2026-37236 · CVE-2026-41178 · CVE-2026-48978 · CVE-2026-50151 · CVE-2026-63308 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

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openSUSE-SU-2026:11920-1: grafana-12.4.11-1.1 on GA media

CVE-2026-15815 · CVE-2026-56855 · CVE-2026-76154 · CVE-2026-79656 · CVE-2026-83530 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

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CVE-2025-22869 · CVE-2025-22870 · CVE-2025-22872 · CVE-2025-47911 · CVE-2025-47913 · CVE-2025-47914 · CVE-2025-58058 · CVE-2025-58181 · CVE-2025-58190 · CVE-2026-25680 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-33186 · CVE-2026-33814 · CVE-2026-34986 · CVE-2026-35469 · CVE-2026-39821 · CVE-2026-39827 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39833 · CVE-2026-39834 · CVE-2026-39835 · CVE-2026-41178 · CVE-2026-42502 · CVE-2026-42506 · CVE-2026-42508 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-46598 · CVE-2026-56852 · CVE-2026-56854 · CVE-2026-56855 · CVE-2026-78662 · CVE-2026-84303 · CVE-2026-84304

openSUSE-SU-2026:21843-1: Security update for cadvisor

CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

SUSE-SU-2026:23730-1: Security update for helm

CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

SUSE-SU-2026:23739-1: Security update for google-osconfig-agent

CVE-2026-56852 · CVE-2026-56854 · CVE-2026-56855 · CVE-2026-78662 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:11686-1: helm3-3.21.3-8.1 on GA media

CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:11713-1: trivy-0.74.0-4.1 on GA media

CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

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CVE-2026-41178 · CVE-2026-42499 · CVE-2026-63209 · CVE-2026-77619 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:11700-1: hauler-2.1.0-3.1 on GA media

CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:11718-1: helm-4.2.4-3.1 on GA media

CVE-2026-37236 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

SUSE-SU-2026:4308-1: Security update for apptainer

CVE-2026-56854 · CVE-2026-56855 · CVE-2026-78662 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

msrc_CVE-2026-84304: gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation

CVE-2026-84304

openSUSE-SU-2026:21879-1: Security update for google-guest-agent

CVE-2026-56852 · CVE-2026-56854 · CVE-2026-56855 · CVE-2026-78662 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

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CVE-2026-41178 · CVE-2026-59831 · CVE-2026-63209 · CVE-2026-72924 · CVE-2026-78669 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

RHSA-2026:95591: Red Hat Security Advisory: Cluster Observability Operator - 1.5

openSUSE-SU-2026:12253-1: tekton-cli-0.46.2-1.1 on GA media

CVE-2026-111943 · CVE-2026-84304

SUSE-SU-2026:23506-1: Security update for helm

CVE-2026-37236 · CVE-2026-41178 · CVE-2026-48978 · CVE-2026-50151 · CVE-2026-63308 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:11925-1: prometheus-blackbox_exporter-0.26.0-9.1 on GA media

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SUSE-SU-2026:23708-1: Security update for google-cloud-sap-agent

CVE-2026-56852 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

openSUSE-SU-2026:21886-1: Security update for mcphost

CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

RHSA-2026:92303: Red Hat Security Advisory: multicluster engine for Kubernetes v2.8.12 security update

CVE-2026-33818 · CVE-2026-39822 · CVE-2026-39834 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-63209 · CVE-2026-84304 · CVE-2026-93748 · CVE-2026-106445 · CVE-2026-106446

openSUSE-SU-2026:11732-1: containerized-data-importer1.66-api-1.66.1-1.1 on GA media

CVE-2026-41178 · CVE-2026-56854 · CVE-2026-56855 · CVE-2026-84303 · CVE-2026-84304

openSUSE-SU-2026:11697-1: distribution-registry-3.1.1-6.1 on GA media

CVE-2026-37236 · CVE-2026-84303 · CVE-2026-84304 · CVE-2026-84445

SUSE-SU-2026:24150-1: Security update for amazon-ecs-init

CVE-2026-41178 · CVE-2026-84303 · CVE-2026-84304

openSUSE-SU-2026:22064-1: Security update for cosign

CVE-2026-56852 · CVE-2026-56854 · CVE-2026-56855 · CVE-2026-56864 · CVE-2026-78662 · CVE-2026-84304

Source published: Sep 1, 2026, 6:19:10 PM (timezone not stated)
Source modified: Sep 1, 2026, 7:24:36 PM (timezone not stated)
Saved here: 11 Nov 2026 17:00:52 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 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

nvd · CVE-2026-84304

Published

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-400

Original publisher date fields

published: 2026-09-01T19:17:30.743

lastModified: 2026-09-09T21:09:13.080

Source published: 1 Sep 2026 19:17:30 UTC
Source modified: 9 Sep 2026 21:09:13 UTC
Saved here: 25 Oct 2026 16:19:16 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · [email protected] · Secondary · 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

osv · GHSA-vp52-pcj8-j9qc

Published

### Impact An unauthenticated remote attacker can initiate a gRPC stream and purposefully fragment their payload into millions of tiny (e.g., 1-byte) HTTP/2 DATA frames. Even if the total payload volume falls within the configured connection and stream flow-control windows, each independent fragment incurs memory overhead due to internal tracking structures and queue allocation. Repeated fragmentation massively inflates the heap space consumed by the stream. An attacker multiplexing multiple concurrent streams can exhaust the memory bounds of the runtime, forcing a runtime panic or OutOfMemory condition and leading to a remote Denial of Service (DoS). ### Patches The change to fix this issue is merged in `master` and a patch release, 1.83.1, has been published that contains this fix. ### Workarounds This vulnerability is mitigated by implementing receive buffer compaction. Consecutive small data buffers are automatically coalesced into larger buffers from a shared pool once the overhead is perceived to be excessive relative to actual payload data, drastically minimizing per-frame memory overheads. This behavior is enabled by default. A temporary escape hatch is provided via the environment variable `GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION=false` to disable the feature if unforeseen issues arise, but it will be removed in a future release.

Source published: 1 Sep 2026 21:32:41 UTC
Source modified: 15 Sep 2026 19:10:44 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V4 · 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

Publisher rating · HIGH

osv · GO-2026-6348

Published

Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation in google.golang.org/grpc

Source published: 15 Sep 2026 18:39:25 UTC
Source modified: 15 Sep 2026 19:00:16 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.