NULL pointer dereference in Apache bRPC - CVE-2026-82953
Published: October 23, 2026
Vulnerability identifier: #VU157362
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-82953
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by crashing a bRPC RTMP server.
The vulnerability exists due to a null pointer dereference in Apache bRPC's RtmpChunkStream::OnCreateStream() error path when RtmpService::NewStream() returns null and writing the rejection response fails. A remote attacker can send a createStream command to a service that rejects it and close the connection before the rejection response is written to trigger access to stream->_onfail_id through a null pointer and crash the server.
Affected software
Apache bRPC
How to mitigate CVE-2026-82953
Install security update from vendor's website.
Apache bRPC - update to 1.18.0