Dpdk: dpdk: stack and heap buffer overflow in nfp vdpa driver
Summary
| CVE | CVE-2026-86856 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-14 18:19:19 UTC |
| Updated | 2026-10-15 15:17:38 UTC |
| Description | A flaw was found in the DPDK nfp vDPA driver. Stack and heap buffers sized for a single queue pair can be overflowed when more virtqueues are configured, leading to a host crash or memory corruption. |
Risk And Classification
Primary CVSS: v3.1 6.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Problem Types: CWE-787 | CWE-787 Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 6.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 6.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
ChangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Fast Datapath For RHEL 10 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 10 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 10 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 8 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 8 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 8 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 8 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 8 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 8 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 8 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 9 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 9 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 9 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 9 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 9 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 9 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 9 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 9 | Not specified | Not specified |
| CNA | Red Hat | Fast Datapath For RHEL 9 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 10 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4 | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4 | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4 | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenStack Platform 13 Queens | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/security/cve/CVE-2026-86856 | [email protected] | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Red Hat would like to thank Anthropic Research for reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-09-08T15:37:20.220Z | Reported to Red Hat. |
| CNA | 2026-10-14T15:02:25.357Z | Made public. |
Workarounds
CNA: Avoid using the nfp vDPA driver in production until patched. Do not attach untrusted guests to an NFP VF running with class=vdpa.
There are currently no legacy QID mappings associated with this CVE.