CVE-2026-86848
dpdk: dpdk: Time-of-check/time-of-use vulnerability allowing guest-triggered out-of-bounds write in vhost-crypto
Severity
ImportantRed 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. The indirect-descriptor snapshot double-fetches a guest descriptor next index, allowing a malicious guest to cause an out-of-bounds access in the host 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 Important. 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 · 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition