CVE-2026-86565

Dpdk: dpdk: guest can desynchronize virtqueue size from inflight descriptor table size, causing out-of-bounds write

CVE-2026-86565 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-86565, released October 21, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.8

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0017

6th percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
dpdk · Debian 13.5 (trixie)	24.11.8-0+deb13u1	DEBIAN-CVE-2026-86565	Oct 21, 2026
dpdk · Debian 14	25.11.4-1	DEBIAN-CVE-2026-86565	Oct 21, 2026
dpdk · RHEL 10	25.11-2.el10_2	RHSA-2026:94630	Nov 4, 2026
dpdk · RHEL 9	2:25.11-2.el9_8	RHSA-2026:94629	Nov 4, 2026
dpdk · almalinux 10	2:25.11-2.el10_2	ALSA-2026:94630	Nov 7, 2026
dpdk · almalinux 9	2:25.11-2.el9_8	ALSA-2026:94629	Nov 7, 2026
dpdk · ol 10	2:25.11-2.el10_2	ELSA-2026-94630	Nov 7, 2026
dpdk · ol 9	2:25.11-2.el9_8	ELSA-2026-94629	Nov 7, 2026
dpdk · rocky 10	2:25.11-2.el10_2	RLSA-2026:94630	Nov 7, 2026
dpdk · rocky 9	2:25.11-2.el9_8	RLSA-2026:94629	Nov 7, 2026
dpdk-devel · RHEL 9	2:25.11-2.el9_8	RHSA-2026:94629	Nov 4, 2026
dpdk-devel · almalinux 10	2:25.11-2.el10_2	ALSA-2026:94630	Nov 7, 2026
dpdk-devel · almalinux 9	2:25.11-2.el9_8	ALSA-2026:94629	Nov 7, 2026
dpdk-devel · ol 10	2:25.11-2.el10_2	ELSA-2026-94630	Nov 7, 2026
dpdk-devel · ol 9	2:25.11-2.el9_8	ELSA-2026-94629	Nov 7, 2026
dpdk-doc · RHEL 9	2:25.11-2.el9_8	RHSA-2026:94629	Nov 4, 2026
dpdk-doc · almalinux 10	2:25.11-2.el10_2	ALSA-2026:94630	Nov 7, 2026
dpdk-doc · almalinux 9	2:25.11-2.el9_8	ALSA-2026:94629	Nov 7, 2026
dpdk-doc · ol 10	2:25.11-2.el10_2	ELSA-2026-94630	Nov 7, 2026
dpdk-doc · ol 9	2:25.11-2.el9_8	ELSA-2026-94629	Nov 7, 2026
dpdk-tools · RHEL 9	2:25.11-2.el9_8	RHSA-2026:94629	Nov 4, 2026
dpdk-tools · almalinux 10	2:25.11-2.el10_2	ALSA-2026:94630	Nov 7, 2026
dpdk-tools · almalinux 9	2:25.11-2.el9_8	ALSA-2026:94629	Nov 7, 2026
dpdk-tools · ol 10	2:25.11-2.el10_2	ELSA-2026-94630	Nov 7, 2026
dpdk-tools · ol 9	2:25.11-2.el9_8	ELSA-2026-94629	Nov 7, 2026

Details

Published
October 14, 2026
Weakness
Out-of-bounds Write
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-86565

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