Bug 2523362 (CVE-2026-78684)

Summary: CVE-2026-78684 vllm: vLLM: Denial of Service via DeepStream backend resource control bypass.
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: alinfoot, bbrownin, dtrifiro, weaton
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in vLLM. Unauthenticated attackers can exploit this vulnerability by activating the DeepStream backend during a request. This allows them to initialize the process-wide GPU decode pool and submit video that bypasses resource controls, leading to a partial denial of service for concurrent requests.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-25 11:42:14 UTC
vLLM before 0.27.0 fails to properly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path. Unauthenticated attackers can activate DeepStream at request time to initialize the process-wide GPU decode pool and submit video that bypasses resource controls, causing partial denial of service for concurrent requests.