CVE-2026-82953 Details
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
A NULL pointer dereference vulnerability has been identified in the RTMP protocol implementation of Apache bRPC, affecting versions prior to 1.18.0. This vulnerability allows remote attackers to crash the server, leading to a denial-of-service condition, by sending a crafted createStream command. The issue arises when an RTMP service rejects a createStream request by returning a null stream. If the server's error response writing fails, the error-handling path inadvertently dereferences the null stream pointer, causing the process to crash. This vulnerability can be exploited by a remote client that sends a createStream command and then closes the connection before the rejection response is transmitted.
Upgrade Apache bRPC to version 1.18.0 or apply the patch available in pull request #3508.
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 26, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/apache/brpc/pull/3508 | [email protected] | Source CodeVendor |
| https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb | [email protected] | AdvisoryBundleMailing ListRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [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 26, 2026 | CVE Translated | [email protected] |
| Oct 26, 2026 | CVE Modified | CISA-ADP |
| Oct 21, 2026 | New CVE Received | [email protected] |