What is CVE-2026-86563?

CVE-2026-86563 is a high-severity vulnerability in Red Hat Fast Datapath For Rhel 10, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.8/10. Published 2026-10-14.

How severe is CVE-2026-86563?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Red Hat Fast Datapath For Rhel 10

CVE-2026-86563

A flaw was found in DPDK lib/vhost. A double-offset bug in vhost log mapping calculation can lead to incorrect memory access.

Published 2026-10-14 · last modified 2026-10-14.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size

References

access.redhat.com/security/cve/CVE-2026-86563 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-86563?: CVE-2026-86563 is a high-severity vulnerability in Red Hat Fast Datapath For Rhel 10, classified under Incorrect Calculation of Buffer Size. CVSS score: 7.8/10. Published 2026-10-14.
How severe is CVE-2026-86563?: High severity. CVSS v3 base score is 7.8 out of 10.