Write-Back Chain Cleanup Flaw in DPDK vhost-crypto by Red Hat
CVE-2026-86847

6.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Fast Datapath For Rhel 10
Fast Datapath For Rhel 8
Fast Datapath For Rhel 9
Red Hat Enterprise Linux 10
Vendor
CVE Published:
14 October 2026

What is CVE-2026-86847?

A vulnerability has been identified in the DPDK vhost-crypto component that can lead to instability in host processes. The issue arises due to an incorrect handling of the write-back chain cleanup following a failure in mapping a guest descriptor. This flaw can result in the host's vhost-crypto process becoming unresponsive or crashing. It is crucial for users to review their configurations and apply any necessary patches to mitigate potential risks associated with this vulnerability.

References

https://access.redhat.com/security/cve/CVE-2026-86847
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2529847
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Anthropic Research for reporting this issue.
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