CVE-2026-82210 Details
Description
Enforceable assertion in the streaming feature of Apache bRPC (version < 1.18.0) on all platforms allows a remote attacker to crash the server process by sending a malformed stream feedback frame. Root Cause: When handling FRAME_TYPE_FEEDBACK frames, bRPC calls Stream::SetRemoteConsumed() which contains CHECK(_cur_buf_size > 0) and unconditionally asserts CHECK(buf.IsEmpty()) on the frame payload. A feedback frame that carries an unexpected payload, or a feedback frame received on a stream where flow control is disabled (cur_buf_size == 0), reaches these assertions. On failure, CHECK failures abort the process, allowing an unauthenticated single client (once a stream is established) to terminate the server and cause a denial of service. Affected Scenarios: Use bRPC server with the streaming control feature (Stream API) served from untrusted network. How to Fix: 1. Upgrade bRPC to version 1.18.0, which fixes this issue. 2. Apply this patch: https://github.com/apache/brpc/pull/3494 The fix rejects malformed feedback frames with EPROTO and closes only the affected stream instead of crashing the whole process, and it bounds buffer shrinking so cur_buf_size never drops to 0 while flow control is enabled.
A denial-of-service vulnerability has been identified in the streaming feature of Apache bRPC, affecting versions prior to 1.18.0. This vulnerability allows a remote attacker to crash the server process by sending a malformed stream feedback frame. The issue arises when the server handles FRAME_TYPE_FEEDBACK frames by calling Stream::SetRemoteConsumed(), which includes a check that the current buffer size is greater than zero and an assertion that the frame payload is empty. A feedback frame with an unexpected payload or one received on a stream with flow control disabled can trigger these assertions, leading to a process crash. This vulnerability can be exploited by an unauthenticated client once a stream is established, causing a server crash and denial-of-service condition.
Upgrade Apache bRPC to version 1.18.0 or later, or apply the patch available in PR #3494. After upgrading or applying the patch, the server will reject malformed feedback frames, close only the affected stream, and prevent the buffer size from dropping to zero while flow control is active.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 21, 2026CISA-ADP
Assessed Oct 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb | [email protected] | AdvisoryBundleMailing ListRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-617 | Reachable Assertion | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Apache bRPC | < 1.18.0 (semver) |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 30, 2026 | CVE Modified | CISA-ADP |
| Oct 26, 2026 | CVE Translated | [email protected] |
| Oct 21, 2026 | New CVE Received | [email protected] |