Out-of-Bounds Write Vulnerability in DPDK vhost-crypto by Red Hat
CVE-2026-86846

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-2026-86846?

A significant flaw exists in the DPDK vhost-crypto module, wherein an attacker can exploit a guest-initiated avail-ring descriptor index without proper bounds checking. This oversight can lead to a critical security gap, allowing for out-of-bounds writes in the host's vhost-crypto backend, potentially compromising system stability and security.

References

https://access.redhat.com/security/cve/CVE-2026-86846
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2529846
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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