Dpdk: dpdk: time-of-check/time-of-use vulnerability allowing guest-triggered out-of-bounds write in vhost-crypto
Summary
| CVE | CVE-2026-86848 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-14 18:19:19 UTC |
| Updated | 2026-10-14 20:18:00 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Problem Types: CWE-367 | CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 8.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
ChangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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 |
|---|---|---|---|
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-86848 | [email protected] | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-09-08T14:49:04.382Z | Reported to Red Hat. |
| CNA | 2026-10-14T15:02:01.496Z | Made public. |
Workarounds
CNA: Do not attach a virtio-crypto vhost-user backend to untrusted guests.
There are currently no legacy QID mappings associated with this CVE.