CVE-2026-86563 Red Hat CVE debrief

Who should care

Defenders responsible for systems using DPDK, especially in Red Hat environments, should assess the potential impact of this vulnerability on their specific deployment contexts.

Why it matters

A double-offset bug in vhost log mapping calculation in DPDK can lead to incorrect memory access, affecting various Red Hat products.

• Verify the presence of this vulnerability in your environment.
• Assess the potential impact on your specific deployment contexts.
• Review and apply patches or updates from Red Hat as they become available.

Technical summary

A flaw was found in DPDK lib/vhost. A double-offset bug in vhost log mapping calculation can lead to incorrect memory access. This issue affects various products from Red Hat, including Fast Datapath for RHEL 8, 9, and 10, as well as Red Hat Enterprise Linux 8, 9, and 10, and Red Hat OpenShift Container Platform 4.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their environments, especially in systems using DPDK, and assess the potential impact on their specific deployment contexts.

Recommended defensive actions

• Verify the presence of this vulnerability in your environment, especially in systems using DPDK.
• Assess the potential impact on your specific deployment contexts.
• Review and apply patches or updates from Red Hat as they become available.

Evidence notes

The CVE record and source item provide details about the double-offset bug in vhost log mapping calculation in DPDK. However, specific version information and exploitation details are not provided.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.