Bug 2546180 (CVE-2026-105753)

Summary: CVE-2026-105753 vllm: vllm: Denial of Service via multimodal cache desynchronization
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. This vulnerability allows a remote user to cause a Denial of Service (DoS) on the model serving engine. The issue occurs when a multimodal request is rejected after media processing, causing the frontend and backend caches to become desynchronized. A subsequent request reusing the same media identifier triggers an internal assertion failure due to missing cached items, crashing the service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-05 22:51:15 UTC 
vLLM is an inference and serving engine for large language models. Prior to 0.28.0, the default mirrored multimodal LRU cache can commit a media hash in the frontend sender cache during multimodal rendering and before engine admission, while the engine receiver cache never receives the payload if that request is rejected. A later request reusing the same media hash causes MultiModalProcessorSenderCache to send no payload and MultiModalReceiverCache to reach an assertion with the message "Expected a cached item," producing a shared-service availability failure. This issue is fixed in version 0.28.0.