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Vulnerability · Published Oct 14, 2026 · Assigned by redhat

CVE-2026-86565Dpdk: dpdk: guest can desynchronize virtqueue size from inflight descriptor table size, causing out-of-bounds write

High 8.2

In plain English

A high-severity out-of-bounds write in Fast Datapath for RHEL 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.2%top 93.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10dpdk2:25.11-2.el10_2ALSA-2026:94630
AlmaLinux:9dpdk2:25.11-2.el9_8ALSA-2026:94629
AlmaLinux:10dpdk-devel2:25.11-2.el10_2ALSA-2026:94630
AlmaLinux:9dpdk-devel2:25.11-2.el9_8ALSA-2026:94629
AlmaLinux:10dpdk-doc2:25.11-2.el10_2ALSA-2026:94630
AlmaLinux:9dpdk-doc2:25.11-2.el9_8ALSA-2026:94629
AlmaLinux:10dpdk-tools2:25.11-2.el10_2ALSA-2026:94630
AlmaLinux:9dpdk-tools2:25.11-2.el9_8ALSA-2026:94629
Debian:12dpdkno fix listedDEBIAN-CVE-2026-86565
Debian:13dpdk24.11.8-0+deb13u1DEBIAN-CVE-2026-86565
Debian:14dpdk25.11.4-1DEBIAN-CVE-2026-86565
Rocky Linux:10dpdk2:25.11-2.el10_2RLSA-2026:94630
Rocky Linux:9dpdk2:25.11-2.el9_8RLSA-2026:94629
Ubuntu:22.04:LTSdpdkno fix listedUBUNTU-CVE-2026-86565
Ubuntu:24.04:LTSdpdkno fix listedUBUNTU-CVE-2026-86565
Ubuntu:26.04:LTSdpdkno fix listedUBUNTU-CVE-2026-86565
Ubuntu:26.10dpdkno fix listedUBUNTU-CVE-2026-86565

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Fast Datapath for RHEL 10 see references
Red Hat Fast Datapath for RHEL 10 see references
Red Hat Fast Datapath for RHEL 10 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenStack Platform 13 (Queens) see references

Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References