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CVE-2026-86561 Red Hat CVE debrief

A flaw in DPDK lib/vhost allows a host crash or memory corruption due to inadequate memory size validation before mmap during vhost memory-region setup. This issue affects multiple Red Hat products, including Fast Datapath for RHEL 8, 9, 10, Red Hat Enterprise Linux 8, 9, 10, and Red Hat OpenShift Container Platform 4. The vulnerability can lead to a host crash or memory corruption, requiring immediate attention and verification. Defenders should prioritize verifying exposure, especially for Red Hat products, and assess the need for updates or compensating controls. The affected products and components should be reviewed, and system logs should be monitored for signs of potential

Vendor
Red Hat
Product
Fast Datapath for RHEL 10
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-14
Original CVE updated
2026-10-14
Advisory published
2026-10-14
Advisory updated
2026-10-14

Who should care

Defenders responsible for Red Hat products, especially those using DPDK, should assess exposure and prioritize verification and remediation efforts.

Why it matters

CVE-2026-86561 is a vulnerability in DPDK lib/vhost that can lead to a host crash or memory corruption. Defenders should prioritize verifying exposure, especially for Red Hat products, and assess the need for updates or compensating controls.

  • Potential host crash or memory corruption require immediate attention and verification.
  • Affected systems may need urgent patching or updates to prevent exploitation.
  • Defenders must verify exposure in their environments, especially for systems using affected DPDK versions.

Technical summary

The vulnerability is caused by missing memory size validation before mmap in vhost memory region setup, which can lead to a host crash or memory corruption. The affected products include Fast Datapath for RHEL 8, 9, 10, Red Hat Enterprise Linux 8, 9, 10, and Red Hat OpenShift Container Platform 4.

Defensive priority

Defenders should prioritize verifying exposure in their environments, especially for systems using affected DPDK versions, and assess the need for updates or compensating controls.

Recommended defensive actions

  • Verify if your environment uses affected DPDK versions and assess the need for updates or patches.
  • Review and apply Red Hat advisories for affected products.
  • Monitor system logs for signs of potential exploitation or memory corruption.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. Red Hat has provided advisories and patches for affected products. The vulnerability is caused by missing memory size validation before mmap in vhost memory region setup. The affected products include Fast Datapath for RHEL 8, 9, 10, Red Hat Enterprise Linux 8, 9, 10, and Red Hat OpenShift Container Platform 4. Defenders should verify if their environment uses affected DPDK versions and assess the need for updates or

Sources and references

Verified primary and authoritative sources

  • CVE-2026-86561 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-86561

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-86561 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-86561

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.