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CVE-2026-84304

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

Published: Sep 1, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-400
N/ACVSS
NVD MITRE
EPSS Score
0.4%
Top 64.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

Weaknesses

CWE-400

Affected Products

grpc
oss-project
grpc-goLibrary
OSS Libraries / generic-library

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

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MITRE ATT&CK

1 technique
Impact
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References

https://github.com/grpc/grpc-go/security/advisories/GHSA-vp52-pcj8-j9qc
github.com
https://github.com/grpc/grpc-go/pull/9331
github.com
https://github.com/grpc/grpc-go/pull/9333
github.com
and 3 more references View all →
News mentions
1

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