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
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/apache/brpc/pull/3508
- https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb
FAQ
What is CVE-2026-82953?
CVE-2026-82953 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 createStre...
How severe is CVE-2026-82953?
CVE-2026-82953 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-82953?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.