Vulnerability-Lookup

GHSA-54RX-JMRP-J5MW

Vulnerability from github – Published: 2026-10-21 15:42 – Updated: 2026-10-21 15:42

Details

A data race in the RDMA transport of Apache bRPC (versions < 1.18.0) allows a remote client to crash the server process (denial of service) when RDMA is enabled at build time and runtime.

Root Cause: When a bRPC server negotiates RDMA with a client, the handshake completes on the TCP fd, but the server kept parsing that fd afterwards as if it were still an RPC channel. The TCP-fd input stream and the RDMA QP input stream (driven by CQ events) shared the same Socket::_read_buf, preferred_index and parsing_context without synchronization. In addition, CQ event processing could start while the handshake parsing was still in progress, and the handshake ACK phase could consume bytes belonging to the next protocol. A remote, unauthenticated client that has completed the RDMA handshake can send data on the TCP fd at the same time RDMA messages are being processed, corrupting the shared input buffer and parser state and crashing the server process (CWE-362, availability impact).

Affected Scenarios: Use a bRPC server with RDMA support enabled (built with BRPC_WITH_RDMA and serving rdma:// / SOCKET_MODE_RDMA sockets) and accept connections from untrusted clients. Deployments without RDMA are not affected.

How to Fix: (Choose one of the following options) 1. Upgrade bRPC to version 1.18.0, which fixes this issue. 2. Apply this patch: https://github.com/apache/brpc/pull/3505

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  "affected": [],
  "aliases": [
    "CVE-2026-82942"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
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    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-21T13:20:03Z",
    "severity": null
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  "details": "A data race in the RDMA transport of Apache bRPC (versions \u003c 1.18.0) allows a remote client to crash the server process (denial of service) when RDMA is enabled at build time and runtime.\n\nRoot Cause:\nWhen a bRPC server negotiates RDMA with a client, the handshake completes on the TCP fd, but the server kept parsing that fd afterwards as if it were still an RPC channel. The TCP-fd input stream and the RDMA QP input stream (driven by CQ events) shared the same Socket::_read_buf, preferred_index and parsing_context without synchronization. In addition, CQ event processing could start while the handshake parsing was still in progress, and the handshake ACK phase could consume bytes belonging to the next protocol. A remote, unauthenticated client that has completed the RDMA handshake can send data on the TCP fd at the same time RDMA messages are being processed, corrupting the shared input buffer and parser state and crashing the server process (CWE-362, availability impact).\n\nAffected Scenarios:\nUse a bRPC server with RDMA support enabled (built with BRPC_WITH_RDMA and serving rdma:// / SOCKET_MODE_RDMA sockets) and accept connections from untrusted clients. Deployments without RDMA are not affected.\n\nHow to Fix:\n(Choose one of the following options)\n1. Upgrade bRPC to version 1.18.0, which fixes this issue.\n2. Apply this patch:  https://github.com/apache/brpc/pull/3505",
  "id": "GHSA-54rx-jmrp-j5mw",
  "modified": "2026-10-21T15:42:28Z",
  "published": "2026-10-21T15:42:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82942"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/brpc/issues/3479"
    },
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      "url": "https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb"
    }
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  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-82942 (GCVE-0-2026-82942)

Vulnerability from cvelistv5 – Published: 2026-10-21 12:07 – Updated: 2026-10-21 12:07

Title

Apache bRPC: Race Condition on the Shared Socket Input Buffer in the RDMA Transport Causes Remote Denial of Service

Summary

A data race in the RDMA transport of Apache bRPC (versions < 1.18.0) allows a remote client to crash the server process (denial of service) when RDMA is enabled at build time and runtime. Root Cause: When a bRPC server negotiates RDMA with a client, the handshake completes on the TCP fd, but the server kept parsing that fd afterwards as if it were still an RPC channel. The TCP-fd input stream and the RDMA QP input stream (driven by CQ events) shared the same Socket::_read_buf, preferred_index and parsing_context without synchronization. In addition, CQ event processing could start while the handshake parsing was still in progress, and the handshake ACK phase could consume bytes belonging to the next protocol. A remote, unauthenticated client that has completed the RDMA handshake can send data on the TCP fd at the same time RDMA messages are being processed, corrupting the shared input buffer and parser state and crashing the server process (CWE-362, availability impact). Affected Scenarios: Use a bRPC server with RDMA support enabled (built with BRPC_WITH_RDMA and serving rdma:// / SOCKET_MODE_RDMA sockets) and accept connections from untrusted clients. Deployments without RDMA are not affected. How to Fix: (Choose one of the following options) 1. Upgrade bRPC to version 1.18.0, which fixes this issue. 2. Apply this patch: https://github.com/apache/brpc/pull/3505

Severity

No CVSS data available.

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

apache CNA under the mitre root

CNA scorecard B 76/100 over 1088 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/apache/brpc/issues/3479
https://lists.apache.org/thread/2pf15ojj0vr7rtx95…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache bRPC	Affected: 0 , < 1.18.0 (semver)

Credits

bzs1118

Show details on NVD website

JSON

To clipboard

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Sightings

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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