{"id":"DEBIAN-CVE-2026-84304","details":"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.","modified":"2026-09-10T08:47:32.180711930Z","published":"2026-09-01T19:17:30.743Z","upstream":["CVE-2026-84304"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-84304"}],"affected":[{"package":{"name":"golang-google-grpc","ecosystem":"Debian:12","purl":"pkg:deb/debian/golang-google-grpc?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.33.3-2","1.38.0+really1.33.3-1","1.38.0-1","1.38.0-2","1.38.0-3","1.38.0-4","1.38.0-5","1.38.1-1","1.59.0-1","1.60.1-1","1.60.1-2","1.64.0-1","1.64.0-2","1.64.0-3","1.64.0-4","1.64.0-5","1.64.0-6","1.64.0-7","1.66.3-1","1.66.3-2","1.75.1-1","1.79.3-1","1.79.3-1~bpo13+1","1.81.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84304.json"}},{"package":{"name":"golang-google-grpc","ecosystem":"Debian:13","purl":"pkg:deb/debian/golang-google-grpc?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.64.0-7","1.66.3-1","1.66.3-2","1.75.1-1","1.79.3-1","1.79.3-1~bpo13+1","1.81.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84304.json"}},{"package":{"name":"golang-google-grpc","ecosystem":"Debian:14","purl":"pkg:deb/debian/golang-google-grpc?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.64.0-7","1.66.3-1","1.66.3-2","1.75.1-1","1.79.3-1","1.79.3-1~bpo13+1","1.81.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84304.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}