Bug 2524653 (CVE-2026-26447)

Summary: CVE-2026-26447 stomper: Stomper: Denial of Service via Use-After-Free vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Stomper. An unauthenticated client can exploit a use-after-free vulnerability by repeatedly issuing SUBSCRIBE commands for the same destination over a single connection and then closing that connection. This leads to incorrect cleanup of internal subscription structures, resulting in a heap use-after-free during StompClient destruction. Successful exploitation causes the broker process to crash, leading to a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2526339    
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Description OSIDB Bzimport 2026-08-26 20:13:45 UTC
Stomper 5e2741e is vulnerable to Use-After-Free. When a single client repeatedly issues SUBSCRIBE commands for the same destination over one connection and then closes that connection, the broker performs incorrect cleanup of its internal subscription structures. This results in a heap use-after-free during StompClient destruction, causing the broker process to crash. An unauthenticated client can exploit this to reliably trigger a denial of service.