Bug 2529897 (CVE-2026-86856) - CVE-2026-86856 dpdk: dpdk: Stack and heap buffer overflow in nfp vDPA driver
Summary: CVE-2026-86856 dpdk: dpdk: Stack and heap buffer overflow in nfp vDPA driver
Keywords:
Status: NEW
Alias: CVE-2026-86856
Deadline: 2026-12-08
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2552447 2552448
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-08 15:42 UTC by OSIDB Bzimport
Modified: 2026-10-14 16:06 UTC (History)
30 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-09-08 15:42:49 UTC 
A flaw was found in the DPDK nfp vDPA driver. Vring, VFIO MSI-X, and epoll buffers are sized for NFP_VDPA_MAX_QUEUES (one queue pair), but start and interrupt paths use unbounded rte_vhost_get_vring_num(). A guest or vhost-user frontend that presents more than two virtqueues can overflow stack and heap in the host vDPA backend.
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