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PatchSiren cyber security CVE debrief

CVE-2026-86856 Red Hat CVE debrief

A flaw was found in the DPDK nfp vDPA driver. Stack and heap buffers sized for a single queue pair can be overflowed when more virtqueues are configured, leading to a host crash or memory corruption. This vulnerability can be triggered by configuring more virtqueues than expected, which can cause a host crash or memory corruption. Defenders should assess exposure and prioritize remediation to prevent potential host crashes or memory corruption. The CVE record and NVD entry provide details on the vulnerability.

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
2026-10-15
Advisory published
2026-10-14
Advisory updated
2026-10-15

Who should care

Defenders responsible for systems using DPDK and related products should assess exposure and prioritize remediation. This includes verifying affected versions and configurations, assessing exposure, and applying vendor-provided remediation and updates to prevent potential host crashes or memory corruption. Operators, administrators, and security teams should review the supplied official advisory or CVE record to and

Why it matters

Defenders should prioritize verifying affected versions and configurations, assessing exposure, and applying vendor remediation to prevent potential host crashes or memory corruption.

  • Verify affected versions and configurations to prioritize remediation
  • Assess exposure of systems using the DPDK nfp vDPA driver
  • Apply vendor-provided remediation and updates to prevent potential host crashes or memory corruption

Technical summary

The DPDK nfp vDPA driver is vulnerable to stack and heap buffer overflows when more virtqueues are configured than expected. This can lead to a host crash or memory corruption. The vulnerability is caused by insufficient buffer sizing for multiple virtqueues. Defenders should prioritize verifying affected versions and configurations, assessing exposure, and applying vendor remediation to prevent potential host crashes or memory corruption.

Defensive priority

Defenders should prioritize verifying affected versions and configurations, assessing exposure, and applying vendor remediation.

Recommended defensive actions

  • Verify affected versions and configurations of DPDK and related products
  • Assess exposure and prioritize remediation for systems using the DPDK nfp vDPA driver
  • Apply vendor-provided remediation and updates

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, specific affected versions and configurations require verification from the supplied official sources.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-86856 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-86856

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

  • CVE-2026-86856 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-86856

    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.