Bug 2552448

Summary: CVE-2026-86856 dpdk: dpdk: Stack and heap buffer overflow in nfp vDPA driver [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: dpdkAssignee: Timothy Redaelli <tredaelli>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: aconole, tredaelli
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["584c2361-54c0-4477-9550-91b276660534"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2529897    

Description Ganesh 2026-10-14 16:06:41 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A flaw was found in the DPDK nfp vDPA driver. Vring, VFIO MSI-X, and epoll buffers are sized for NFP_VDPA_MAX_QUEUES (one queue pair), but start and interrupt paths use unbounded rte_vhost_get_vring_num(). A guest or vhost-user frontend that presents more than two virtqueues can overflow stack and heap in the host vDPA backend.