Bug 2529667 (CVE-2026-86562)

Summary: CVE-2026-86562 dpdk: dpdk: Control-queue descriptor double-fetch overflows host heap in DPDK vhost (VDUSE)
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, echaudro, eglynn, fleitner, jdelft, jjoyce, jpretori, jschluet, jupierce, ktraynor, lgarciaa, lhh, mbiarnes, mburns, mgarciac, ppalepu, ppostler, prdhamdh, rhel-process-autobot, rkhan, security-response-team, sfaye, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in DPDK lib/vhost. A TOCTOU double-fetch of control-queue descriptors allows a heap buffer overflow with attacker-controlled content in the VDUSE control-queue handler.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2552422, 2552423    
Bug Blocks:    
Deadline: 2026-12-08   

Description OSIDB Bzimport 2026-09-08 02:19:11 UTC
A flaw was found in DPDK lib/vhost. A control-queue descriptor double-fetch in virtio_net_ctrl_pop() overflows the host heap in the VDUSE path. An incomplete fix in commit 6ec1778134 (January 2026) bounded descriptor indices but did not snapshot lengths.