Description
Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| gRPC | 1.56.0 – ≤ 1.56.1, 1.55.0 – ≤ 1.55.2, 1.54.0 – ≤ 1.54.2, 1.53.0 – ≤ 1.53.1 | 1.57 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | grpc | No fix yet | — |
| Debian 13 | grpc | No fix yet | — |
| Debian 12 | grpc | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | grpc | No fix yet | — |
| Ubuntu 26.04 LTS | grpc | No fix yet | — |
| Ubuntu 25.10 | grpc | No fix yet | — |
| Ubuntu 24.04 LTS | grpc | No fix yet | — |
| Ubuntu 22.04 LTS | grpc | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | grpc | No fix yet | — |
| Ubuntu 18.04 LTS | grpc | No fix yet | — |
| Ubuntu 16.04 LTS | grpc | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Satellite Capsule 6 | mosquitto | 2.0.17-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite Capsule 6 | puppet-agent | 7.27.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite Capsule 6 | puppetserver | 7.14.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | candlepin +1 | 4.3.11-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | mosquitto | 2.0.17-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | puppet-agent | 7.27.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | puppetserver | 7.14.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | rubygem-grpc | 1.58.0-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | rubygem-puma | 6.3.1-1.el8sat | RHSA-2024:0797 |
| Red Hat Satellite 6 | rubygem-sidekiq | 6.5.12-1.el8sat | RHSA-2024:0797 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SLES 15 SP5 | grpc | 1.60.0-150400.8.3.2 | SUSE-SU-2024:0573-1 |
| SLES 15 SP5 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLES 15 SP5 | re2 | 20240201-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLES 15 SP4 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SLES 15 SP4 | grpc | 1.60.0-150400.8.3.2 | SUSE-SU-2024:0573-1 |
| SLES 15 SP4 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLES 15 SP4 | re2 | 20240201-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLES 3 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLES 3 | python-abseil | 1.4.0-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLES 3 | python-grpcio | 1.60.0-150400.9.3.2 | SUSE-SU-2024:0573-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP4 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SLES for SAP 15 SP4 | grpc | 1.60.0-150400.8.3.2 | SUSE-SU-2024:0573-1 |
| SLES for SAP 15 SP4 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLES for SAP 15 SP4 | re2 | 20240201-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLE Micro 5.5 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SLE Micro 5.5 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLE Micro 5.4 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SLE Micro 5.4 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLE Micro 5.3 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SLE Micro 5.3 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLE HPC 15 SP4 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SLE HPC 15 SP4 | grpc | 1.60.0-150400.8.3.2 | SUSE-SU-2024:0573-1 |
| SLE HPC 15 SP4 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SLE HPC 15 SP4 | re2 | 20240201-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SUSE Manager Proxy 4.3 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SUSE Manager Proxy 4.3 | grpc | 1.60.0-150400.8.3.2 | SUSE-SU-2024:0573-1 |
| SUSE Manager Proxy 4.3 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SUSE Manager Proxy 4.3 | re2 | 20240201-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SUSE Linux Enterprise Installer Updates 15 SP5 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SUSE Linux Enterprise Installer Updates 15 SP5 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| SUSE Linux Enterprise Installer Updates 15 SP4 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| SUSE Linux Enterprise Installer Updates 15 SP4 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-grpcio | 1.84.0-1.1 | openSUSE-SU-2026:11926-1 |
| openSUSE Leap 15.5 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| openSUSE Leap 15.5 | grpc | 1.60.0-150400.8.3.2 | SUSE-SU-2024:0573-1 |
| openSUSE Leap 15.5 | opencensus-proto | 0.3.0+git.20200721-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| openSUSE Leap 15.5 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| openSUSE Leap 15.5 | python-abseil | 1.4.0-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| openSUSE Leap 15.5 | python-grpcio | 1.60.0-150400.9.3.2 | SUSE-SU-2024:0573-1 |
| openSUSE Leap 15.5 | re2 | 20240201-150400.9.3.1 | SUSE-SU-2024:0573-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| openSUSE Leap Micro 5.4 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
| openSUSE Leap Micro 5.3 | abseil-cpp | 20230802.1-150400.10.4.1 | SUSE-SU-2024:0573-1 |
| openSUSE Leap Micro 5.3 | protobuf | 25.1-150400.9.3.1 | SUSE-SU-2024:0573-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | grpc +5 | 1.56.2-10.amzn2023 | ALAS2023-2023-282 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | grpc | 1.62.0-2 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | kube-fluentd-operator +3 | 1.18.2-r1 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | grpcio | >= 1.55.0, < 1.55.3 · >= 1.54.0, < 1.54.3 · >= 1.53.0, < 1.53.2 | 1.55.3, 1.54.3, 1.53.2 | PYSEC-2026-1428 |
| PyPI | grpcio | >= 1.55.0, < 1.55.3 | 1.55.3 | GHSA-p25m-jpj4-qcrr |
| PyPI | grpcio | >= 1.54.0, < 1.54.3 | 1.54.3 | GHSA-p25m-jpj4-qcrr |
| PyPI | grpcio | >= 1.53.0, < 1.53.2 | 1.53.2 | GHSA-p25m-jpj4-qcrr |
| RubyGems | grpc | >= 1.56.0, < 1.56.2 | 1.56.2 | GHSA-p25m-jpj4-qcrr |
| RubyGems | grpc | >= 1.55.0, < 1.55.3 | 1.55.3 | GHSA-p25m-jpj4-qcrr |
| RubyGems | grpc | >= 1.54.0, < 1.54.3 | 1.54.3 | GHSA-p25m-jpj4-qcrr |
| RubyGems | grpc | >= 1.53.0, < 1.53.2 | 1.53.2 | GHSA-p25m-jpj4-qcrr |
Advisories 7
- RHSA-2024:0797 Red Hat Security Advisory: Satellite 6.14.2 Async Security Update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- openSUSE-SU-2026:11926-1 python313-grpcio-1.84.0-1.1 on GA media SUSE / openSUSE Security Updates · Sep 30, 2026
- SUSE-SU-2024:0573-1 Security update for abseil-cpp, grpc, opencensus-proto, protobuf, python-abseil, python-grpcio, re2 SUSE / openSUSE Security Updates · Feb 4, 2026
- VDE-2024-073 Phoenix Contact: Multiple Vulnerabilities in PLCnext Firmware CERT@VDE · May 22, 2025
- NCSC-2025-0028 Kwetsbaarheden verholpen in Oracle Analytics NCSC-NL (Netherlands) · Jan 22, 2025
- WID-SEC-2024-1591 Juniper JUNOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2024
- ALAS2023-2023-282 Important: grpc security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 2023