Bug 2529666 (CVE-2026-86561)

Summary: CVE-2026-86561 dpdk: dpdk: Missing memory size validation before mmap in vhost memory region setup
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
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
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in DPDK lib/vhost. Memory size is not adequately validated before mmap during vhost memory-region setup, which can lead to a host crash or memory corruption.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2552414, 2552415    
Bug Blocks:    
Deadline: 2026-12-08   

Description OSIDB Bzimport 2026-09-08 02:09:27 UTC 
A flaw was found in DPDK lib/vhost. The vhost-user SET_MEM_TABLE mmap path does not adequately validate frontend-supplied region size before mapping, which may lead to denial of service in the host vhost backend. Integer-overflow and zero-size-after-align checks are already present; the remaining size check is as reported by the DPDK vhost maintainer.