What is CVE-2026-86565?

CVE-2026-86565 is a high-severity vulnerability in Red Hat Fast Datapath For Rhel 10, classified under Out-of-bounds Write. CVSS score: 8.2/10. Published 2026-10-14.

How severe is CVE-2026-86565?

High severity. CVSS v3 base score is 8.2 out of 10.

Buffer overflow in Red Hat Fast Datapath For Rhel 10

CVE-2026-86565

A flaw was found in DPDK lib/vhost. A guest can desynchronize virtqueue size from inflight descriptor table size, causing an out-of-bounds write in the host vhost process.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/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-787 — Out-of-bounds Write

References

access.redhat.com/security/cve/CVE-2026-86565 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-86565?: CVE-2026-86565 is a high-severity vulnerability in Red Hat Fast Datapath For Rhel 10, classified under Out-of-bounds Write. CVSS score: 8.2/10. Published 2026-10-14.
How severe is CVE-2026-86565?: High severity. CVSS v3 base score is 8.2 out of 10.