CVE-2026-86846
dpdk: dpdk: Guest can trigger out-of-bounds write by controlling avail ring index in vhost-crypto
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 15, 2026
Updated · November 4, 2026
Description
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.
Statement
A guest with a virtio-crypto vhost-user device can trigger this flaw. Red Hat has rated this as having a security impact of Moderate. Product impact depends on whether vhost-crypto is built and enabled.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Do not attach a virtio-crypto vhost-user backend to untrusted guests.
CVSS / CWE
CVSS 3.1 · 6.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE-787 · Out-of-bounds Write