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CVE-2026-82425— Apache bRPC: Reachable Assertion in Socket::OnInputEvent Allows 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.

在 Apache bRPC（版本 < 1.18.0）中，所有平台上存在一个可触发的断言（assertion），允许恶意远程对等端导致进程崩溃，从而引发拒绝服务（DoS）攻击。 根本原因： 当启用了健康检查的 Socket 发生失败时， 会关闭其文件描述符（fd），而此时事件分发器（event dispatcher）可能仍在处理一个为该已关闭 fd 获取的输入事件（如 EPOLLIN 或 EVFILT_READ）。如果随后健康检查成功并“复活”了该 Socket， 会再次返回成功，但此时 fd 仍为 -1（下一次写操

AI Predicted 5.9 Difficulty: Moderate
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I. Basic Information for CVE-2026-82425

Vulnerability Information
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Vulnerability Title
Apache bRPC: Reachable Assertion in Socket::OnInputEvent Allows Remote Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
A reachable assertion in Apache bRPC (version < 1.18.0) on all platforms allows a malicious remote peer to crash the process, resulting in denial of service. Root Cause: When a Socket with health checking enabled fails, Socket::WaitAndReset closes its file descriptor while the event dispatcher may still be delivering an input event (EPOLLIN/EVFILT_READ) that was fetched for the just-closed fd. If the health check then succeeds and revives the Socket, Socket::Address succeeds again while the fd is still -1 (the next write reconnects on demand). In that window, Socket::OnInputEvent hits CHECK(!(events & EPOLLIN)) (or the kqueue equivalent) because the Socket is addressable but has no fd. CHECK failures terminate the process when bRPC is built with glog or when the gflag -crash_on_fatal_log is enabled (CHECK always terminates in OFFICIAL_BUILD/NDEBUG builds as well). Affected Scenarios: Applications using bRPC clients with health check enabled (-health_check_interval). A malicious remote peer that the client connects to can deliberately abort connections and immediately accept the health check probes, racing connection teardown against health check revival to trigger the assertion and abort the process. 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/3510 Note: After applying the fix, stale input events on a Socket revived without an fd are silently dropped instead of triggering the assertion. No user-visible interface or wire protocol is changed.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
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-2026-82425

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III. Intelligence Information for CVE-2026-82425

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Other References for CVE-2026-82425 (1)

Same Patch Batch · Apache Software Foundation · 2026-10-21 · 39 CVEs total

CVE-2026-56386 Apache bRPC: Integer Underflow and Out-of-Bounds Read in HTTP/2 DATA Frame Parser
CVE-2026-74758 Apache bRPC: Heap Use-After-Free in RTMP Abort Message Handling
CVE-2026-74757 Apache bRPC: Uncontrolled Memory Allocation via Malicious mcpack Array Item Count
CVE-2026-74755 Apache bRPC: Integer Underflow in mcpack2pb Parser Leading to Denial of Service
CVE-2026-66392 Apache bRPC: TLS Client Accepts Certificates for Mismatched Peer Names
CVE-2026-61916 Apache bRPC: Out-of-bounds Read in URL and Header Lookup Tables on Unsigned-char Platforms
CVE-2026-61902 Apache bRPC: Memory Exhaustion Through Inconsistent Message Body Limits
CVE-2026-58064 Apache bRPC: Denial of Service via Unbounded Redis Inline Command Allocation
CVE-2026-56388 Apache bRPC: Out-of-Bounds Write in Redis Command Parser
CVE-2026-56387 Apache bRPC: Remote Memory Exhaustion in RTMP AMF Parser
CVE-2026-78048 Apache bRPC: Remote Denial of Service via Out-of-Bounds Dynamic Table Sizing in HPACK Deco
CVE-2026-54427 Apache bRPC: Stack Exhaustion via Unbounded Recursion in AMF Parser
CVE-2026-54426 Apache bRPC: Stack Exhaustion via Unbounded Recursion in Redis Reply Parser
CVE-2026-54425 Apache bRPC: Stack Exhaustion via Recursive HPACK Dynamic Table Size Update Decoding
CVE-2026-48830 Apache bRPC: HTTP builtin request can mark a connection authenticated and bypass auth for
CVE-2026-59229 Apache IoTDB: Legacy Pipe Privilege Escalation
CVE-2026-59562 Apache IoTDB: Remote code execution and Unauthenticated path traversal in legacy pipe send
CVE-2026-41114 Apache IoTDB JDBC driver: Large-scale Memory Exhaustion via BigDecimal toPlainString in JD
CVE-2026-58663 Apache IoTDB: Auth Bypass in pipeTransfer() interface
CVE-2026-82231 Apache bRPC: Malformed Thrift T_EXCEPTION reply causes process termination in Thrift clien

Showing top 20 of 39 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Apache bRPC
Same vendor: Apache Software Foundation
Same weakness: CWE-617

V. Comments for CVE-2026-82425

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