Bug 2567874 (CVE-2026-123200)

Summary: CVE-2026-123200 vrpn: vrpn: Denial of Service via out-of-bounds stack write
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in vrpn. An unauthenticated remote attacker can trigger an out-of-bounds write vulnerability by sending specially crafted network messages containing an invalid length index. Successful exploitation leads to memory corruption, causing the application to crash and resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-11-05 22:32:57 UTC 
VRPN through 07.36 contains an out-of-bounds stack write vulnerability in vrpn_Endpoint::handle_sender_message() and handle_type_message() that allows unauthenticated remote peers to write outside a stack buffer via an unchecked length index. Attackers can connect, complete the version-cookie exchange, and send a SENDER_DESCRIPTION or TYPE_DESCRIPTION message with an out-of-range or negative index to crash the process.