What is CVE-2026-86846?

CVE-2026-86846 is a medium-severity vulnerability in Red Hat Fast Datapath For Rhel 10, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-10-14.

How severe is CVE-2026-86846?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Red Hat Fast Datapath For Rhel 10

CVE-2026-86846

A flaw was found in DPDK lib/vhost vhost-crypto. A guest can supply an avail-ring descriptor index that is used without bounds checking, causing an out-of-bounds write in the host vhost-crypto backend.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/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-2026-86846 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-86846?: CVE-2026-86846 is a medium-severity vulnerability in Red Hat Fast Datapath For Rhel 10, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-10-14.
How severe is CVE-2026-86846?: Medium severity. CVSS v3 base score is 6.5 out of 10.