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CVE-2026-82953— Apache bRPC: NULL Pointer Dereference in RTMP createStream Error Path Leading to Remote Denial of Service

Quick assessment

Affected
Apache Software Foundation Apache bRPC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache bRPC（版本 < 1.18.0）在所有平台上实现的 RTMP 协议中存在空指针解引用漏洞。远程攻击者可通过构造恶意的 createStream 命令，导致服务器崩溃，从而引发拒绝服务（DoS）攻击。 根本原因： 当 RTMP 服务通过 RtmpService::NewStream() 返回空流来拒绝 createStream 请求时，服务器会向客户端发送错误响应。如果该拒绝响应的写入失败（例如，客户端在发送 createStream 命令后立即关闭连接），则 RtmpChunkStream::OnC

AI Predicted 5.5 Difficulty: Easy

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache bRPC < 1.18.0 affected
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I. Basic Information for CVE-2026-82953

Vulnerability Information
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Vulnerability Title
Apache bRPC: NULL Pointer Dereference in RTMP createStream Error Path Leading to Remote Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
NULL pointer dereference in the RTMP protocol implementation in Apache bRPC (version < 1.18.0) on all platforms allows remote attackers to crash the server (denial of service) via a crafted createStream command. Root Cause: When an RTMP service rejects a createStream request by returning a null stream from RtmpService::NewStream(), the server sends an error response to the client. If writing this rejection response fails (for example, because the client closes the connection immediately after sending the createStream command), the error-handling path in RtmpChunkStream::OnCreateStream() dereferences the null stream pointer to access stream->_onfail_id, causing the process to crash. Affected Scenarios: Run an Apache bRPC RTMP server whose RtmpService::NewStream() may return null (i.e., the service rejects createStream requests). A remote client that sends a createStream command and then closes the connection before the rejection response is written can crash the server. 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/3508
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache bRPC 0 ~ 1.18.0 -

II. Public POCs for CVE-2026-82953

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III. Intelligence Information for CVE-2026-82953

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Same Patch Batch · Apache Software Foundation · 2026-10-21 · 69 CVEs total

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CVE-2026-105945 7.7 HIGH Apache Pulsar: Improper Validation of Package Name Components Allows Cross-Tenant Package
CVE-2026-105942 7.7 HIGH Apache Pulsar: Original principal of proxied requests authorized with the proxy's authenti
CVE-2026-111810 7.5 HIGH Apache Traffic Server: Unthrottled per-header diagnostic logging enables a log-flood denia
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Showing top 20 of 69 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Apache bRPC
Same vendor: Apache Software Foundation
Same weakness: CWE-476

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